336=(8+x)*(x-8)

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Solution for 336=(8+x)*(x-8) equation:


Simplifying
336 = (8 + x)(x + -8)

Reorder the terms:
336 = (8 + x)(-8 + x)

Multiply (8 + x) * (-8 + x)
336 = (8(-8 + x) + x(-8 + x))
336 = ((-8 * 8 + x * 8) + x(-8 + x))
336 = ((-64 + 8x) + x(-8 + x))
336 = (-64 + 8x + (-8 * x + x * x))
336 = (-64 + 8x + (-8x + x2))

Combine like terms: 8x + -8x = 0
336 = (-64 + 0 + x2)
336 = (-64 + x2)

Solving
336 = -64 + x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x2' to each side of the equation.
336 + -1x2 = -64 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
336 + -1x2 = -64 + 0
336 + -1x2 = -64

Add '-336' to each side of the equation.
336 + -336 + -1x2 = -64 + -336

Combine like terms: 336 + -336 = 0
0 + -1x2 = -64 + -336
-1x2 = -64 + -336

Combine like terms: -64 + -336 = -400
-1x2 = -400

Divide each side by '-1'.
x2 = 400

Simplifying
x2 = 400

Take the square root of each side:
x = {-20, 20}

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