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justinee
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Can someone check this for me? (completing the square)
 10 months ago
 10 months ago
justinee Group Title
Can someone check this for me? (completing the square)
 10 months ago
 10 months ago

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justinee Group TitleBest ResponseYou've already chosen the best response.0
y = 2x^2  20x  48
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
then i rewrote that into: y = 2(x^2  20x ____) 48 20/2 = 10 then square it and I got 100 y = 2(x^2  20x +100) 48
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
then I added 100 to both sides and I got: y + 100= 2(x  10)^2 48 100 100  y = 2(x  10)^2  148
 10 months ago

halorazer Group TitleBest ResponseYou've already chosen the best response.0
You subtracted 100 though ^
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
you add 48 to the other side and then also the 100 and the quadratic = 148
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
then you can factor the left side
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
can you show me that in steps? like from the beginning
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
you did it rite just set the equation = 0 then subtract 49 from both sides so 2x^220x=48
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
then complete the square and add the 100 to both sides
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
so it'd be 0 = 2(x^2  20x + 100) 48 ?
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
why do I need to factor that
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
Ok I got it thanks! and one more question
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
How would I solve: x^2  38x + c also by completing the square
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
c is a constant most likely just move it to the other side and complete the square
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
what is that going to give me?
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
and what would be the next step
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
0 = (x2  38x ___) +c ?
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
square the 38 and do the same to both sides
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
(x^238x+__)=__c
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
38/2 = 19^2 = 361
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
so that is on both sides
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
(x^238x+361)=361c
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
okay so far i have: (x^2  38x + 361) = 361 c
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
right now you should be able to factor the quadratic which is the point of completing the square
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
so like: ____ x___ = 361 ____+___= 38
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
right it will be the same number it is squared
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
(x19)^2 = 361  c?
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
and the first equation was x^210+25=49
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
what do I do now?
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
with the second you can't do anything it is most likely to show how you did the work
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
so just that ^
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
how would i write tht in intercept form
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
do you mean y=mx+b
 10 months ago

justinee Group TitleBest ResponseYou've already chosen the best response.0
no I also have to rewrite tht in intercept
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
the x intercept is +or(7/5,0)
 10 months ago

Decart Group TitleBest ResponseYou've already chosen the best response.1
that is the y is 0
 10 months ago
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