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careless850
 3 years ago
If someone could help me with these last few problems, it would be nice. Check all polynomials that are perfect square trinomials:
A) 49x^2 − 8x + 16
B) 4a^2 − 20a + 25
C) 25b^2 − 5b + 10
D) 16x^2 − 8x + 1
careless850
 3 years ago
If someone could help me with these last few problems, it would be nice. Check all polynomials that are perfect square trinomials: A) 49x^2 − 8x + 16 B) 4a^2 − 20a + 25 C) 25b^2 − 5b + 10 D) 16x^2 − 8x + 1

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careless850
 3 years ago
Best ResponseYou've already chosen the best response.1Which ones are perfect square trinomials?

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0a is do you know how i figured that out?

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0have you learned foil?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2No A is not the right answer!

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1Diya, there is more than one I can choose for the right answer. How come A isn't one of them?

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1338062447129:dw that is y it is

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2If \( ax^2+bx+c \) is a perfect square trinomial then the discriminant will be zero. Do you know to find the discriminant? \( D= b^2 4ac =0\)

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0thats not how you do that

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2@megan1124 (7x4)(7x4) = 49x^256x+16

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1um.. Can someone just show me how to do these or.. if you are going to argue.. just give me a hint to the right answers please...

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0are you in algebra 1?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2@careless850 Lets check the second option \( 4a^2 − 20a + 25 \) this is of the form \( ax^2+ bx + c \) Now find \(b^24ac \) \(b^24ac = (20)^2 4*4*25= 400400 = 0 \) Now verify if your answer is right \( 4a^2 − 20a + 25 = (52a)(52a) =(52a)^2 \)

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0ok thanks its and b :) because you can divide the first one and last one by a number and get the same number you divided by and get a whole number

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1O.o what? So is one of the answers A or is one B?

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0the 2 answers are a and b because if you factor them you don't get more that 2 numbers like the one i showed you above earlier

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2\( 49x^2 − 8x + 16 \) Find \(b^2 4ac \) b=8 , a=49 , c=16 \(b^2 4ac = (8)^2  4(49)(16) = 3120 \) So option A is not the right answer Can you check for C now?

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1Diya, A isn't right? So the only right answer is B?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2A isn't Right! i just showed you why.. B is right But you have to check the others too

megan1124
 3 years ago
Best ResponseYou've already chosen the best response.0you can have more than one right answer right? if so its a and b

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2@megan1124 A is not the right answer Can you tell me what is (7x4)(7x4) ??

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2Nope, try to solve it and see

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1There is multiple answers that can be right.

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2Can you find the discriminant of C & D ? \( D= b^24ac \)

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1I don't know what the disciminant is.

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2\( 25b^2 − 5b + 10\) this is of the form \( ax^2 + bx +c \) dw:1338063436660:dw so a =25 b=5 c=10 Now find Dicriminant \( D =b^24*a*c\) Can you do that?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2Just plug in the values of a ,b & c in the equation \(b^2  4ac \) can you ?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2@careless850 Pls tell me if you're stuck somewhere

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2is it equal to zero or some other number ?

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1I'm still confused..

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2where are you stuck ? did you find b^2 4ac?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2Find it :) & check if its equal to zero

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.225b^2 − 5b + 10 Given : a =25 b=5 c=10 b^2  4ac

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2(5)^2  4* 25 * 10 is it equal to zero?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2so its not a perfect square trinomial Now do the last one D) 16x^2 − 8x + 1 Can you tell me what is a ,b & c here?

careless850
 3 years ago
Best ResponseYou've already chosen the best response.18 is b and 1 is c.

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2Right!!!!!!! Now Find the discriminant How do you find it?

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1So I would do this.. > 8^2 4*16*1.

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1how to solve that, I don't know, but that's the problem.. lol

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2\( (8)^2  4 \times 16 \times 1 \) What is \( 8^2 \) ?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2Yess!! so its a perfect square trinomial :) You can verify by factoring ^_^

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1I see. Pretty easy now I guess. So the only ones that are perfect square trinomials are B and D?

careless850
 3 years ago
Best ResponseYou've already chosen the best response.1Can you help me with another?

Diyadiya
 3 years ago
Best ResponseYou've already chosen the best response.2Yes, If you factorise 16x^2 − 8x + 1 you'll get (14x)(14x) = (14x)^2 Post it as a new question :)
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