SOLUTION: Square root of x+8=x-4

Question 520675: Square root of x+8=x-4
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
With this Sq rt x+8=x-4
Square both sides:
x+8=(x-4)^2
Expand this out to get:
x+8=x^2-8x+16
Subtract 8 & x to get:
x^2-9x+8=0
factor:
(x-8)(x-1)=0
Solve for x
x=8
x=1
Check the answers:
1 doesn't work
8 works
make sense?
RJ
www.math-unlock.com
RELATED QUESTIONS
(square root of x) +4=(square root of... (answered by jim_thompson5910)

square root of (-4) x square root of... (answered by CharlesG2)

solve square root of 2x=-4 and also square root of x+222-square root of... (answered by swincher4391)

the square root of x-4 - the square root of x+8... (answered by edjones)

Square root 8-x... (answered by CubeyThePenguin)

A.(square root of x)-1=3 B.(square root of xcubed)=8 C.cubed(square root of... (answered by chitra)

solve the (square root of... (answered by haileytucki,ovie27)

square root of (x+4)+4=square root of x+20 only x+4 and x+20 is square... (answered by mananth,jsmallt9)

square root of (x + 64) + 8 =... (answered by jorel1380)