http://puu.sh/3KeJH.jpg

i got the wrong answer... where did i go wrong?

Printable View

- Jul 23rd 2013, 06:04 PMMathnood768rational expressions (word problem 1)
http://puu.sh/3KeJH.jpg

i got the wrong answer... where did i go wrong? - Jul 23rd 2013, 06:26 PMchiroRe: rational expressions (word problem 1)
Hey Mathnood768.

Hint: You need to square both terms before adding them together (and finishing off by taking the square root). (x/2)^2 = x^2/4 for example. - Jul 23rd 2013, 07:05 PMMathnood768Re: rational expressions (word problem 1)
http://puu.sh/3Kh10.jpg

i did what you said but im more off now - Jul 23rd 2013, 07:20 PMchiroRe: rational expressions (word problem 1)
(x/2)^2 + (x-1/4)^2

= x^2/4 + (x^2 - 2x + 1)/16

= 4x^2/16 + (x^2 - 2x + 1)/16

= (5x^2 - 2x + 1)/16

Taking the square root of that gives us

SQRT(5x^2 - 2x + 1)/4