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

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justinee Group TitleBest ResponseYou've already chosen the best response.0
y = 2x^2  20x  48
 9 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
 9 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
 9 months ago

halorazer Group TitleBest ResponseYou've already chosen the best response.0
You subtracted 100 though ^
 9 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
 9 months ago

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

justinee Group TitleBest ResponseYou've already chosen the best response.0
can you show me that in steps? like from the beginning
 9 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
 9 months ago

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

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

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

justinee Group TitleBest ResponseYou've already chosen the best response.0
Ok I got it thanks! and one more question
 9 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
 9 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
 9 months ago

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

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

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

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

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

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

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

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

justinee Group TitleBest ResponseYou've already chosen the best response.0
okay so far i have: (x^2  38x + 361) = 361 c
 9 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
 9 months ago

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

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

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

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

justinee Group TitleBest ResponseYou've already chosen the best response.0
what do I do now?
 9 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
 9 months ago

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

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

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

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

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

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