SOLUTION: Solve the equation for x. Square root of 56-x = x
The correct answer is one of the following. Which one is correct?
A) x=7 only
B) x=7, x=-8
C) x=-8 only
D) x=7, x
Algebra.Com
Question 1198778: Solve the equation for x. Square root of 56-x = x
The correct answer is one of the following. Which one is correct?
A) x=7 only
B) x=7, x=-8
C) x=-8 only
D) x=7, x=8
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Solve the equation for x. Square root of 56-x = x
--------
If you mean
Square both sides
56-x = x^2
x^2 + x - 56 = 0
(x-7)*(x+8) = 0
====================
check each result
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