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anonymous
 5 years ago
for these three equations
x^24x+3=0
x^27x+2=20
x^23x=1
solve at least one by factoring
solve at least one by using the quadratic formula
solve the last one with either of the two options
anonymous
 5 years ago
for these three equations x^24x+3=0 x^27x+2=20 x^23x=1 solve at least one by factoring solve at least one by using the quadratic formula solve the last one with either of the two options

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0solve the second one by factoring and the last one by factoring also the first one you need to solve with quad eq.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0First of all they all need to = 0. The first two should be factoring.. the last one is quadratic formula.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x^2  4x + 3 = 0 Hint (3 * 1 = 3) (3 + 1 = 4)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yea hes right i copied in diff order

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x^2  7x + 2 = 20 x^2  7x  18 = 0 Factors of 18 that subtract to give you 7 What are they?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x^2  3x  1 = 0 the reason you use the quadratic formula is because there are no factors of 1 that subtract to give you 3.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Confused.. what are the solutions to #1 if (x  3)(x  1) = 0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Now on the 2nd one... the factors of 18 are 1 * 18 2 * 9 3 * 6 which pair subtracts to give you 7

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0good so you have (x  9)(x + 2) = 0 what would be your answers for x

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Very good. Now we need to do the quadratic formula.. do you know what that is? yes/no

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0well.. you have to get it in this form first.. so we have x^2  3x  1 = 0 what are a? b? c?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Good. the formula is x = b + sqrt(b^2  4ac) all over 2a Have you seen this the + means a + with a  sign under it.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0b I like to read as the opposite of b so the opposite of 3 is +3

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x = 3 + sqrt((3)^2  4(1)(1)  2(1)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x = 3 + sqrt(9 +4)  2 do you see how I got this? the (4)(1)(1) is a + 4

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0OK.. so your answer is x = 3 + sqrt(13)  2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0If you are using a calculator put in (3 + sqrt(13))/2 (3  sqrt(13))/2

myininaya
 5 years ago
Best ResponseYou've already chosen the best response.0but those aren't the answers those are approximations since the sqrt(13) is irrational
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