(2x-8)(7x+7)=0

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Solution for (2x-8)(7x+7)=0 equation: 


Simplifying
(2x + -8)(7x + 7) = 0

Reorder the terms:
(-8 + 2x)(7x + 7) = 0

Reorder the terms:
(-8 + 2x)(7 + 7x) = 0

Multiply (-8 + 2x) * (7 + 7x)
(-8(7 + 7x) + 2x * (7 + 7x)) = 0
((7 * -8 + 7x * -8) + 2x * (7 + 7x)) = 0
((-56 + -56x) + 2x * (7 + 7x)) = 0
(-56 + -56x + (7 * 2x + 7x * 2x)) = 0
(-56 + -56x + (14x + 14x2)) = 0

Combine like terms: -56x + 14x = -42x
(-56 + -42x + 14x2) = 0

Solving
-56 + -42x + 14x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '14'.
14(-4 + -3x + x2) = 0

Factor a trinomial.
14((-1 + -1x)(4 + -1x)) = 0

Ignore the factor 14.

Subproblem 1
Set the factor '(-1 + -1x)' equal to zero and attempt to solve:

Simplifying
-1 + -1x = 0

Solving
-1 + -1x = 0

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

Add '1' to each side of the equation.
-1 + 1 + -1x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -1x = 0 + 1
-1x = 0 + 1

Combine like terms: 0 + 1 = 1
-1x = 1

Divide each side by '-1'.
x = -1

Simplifying
x = -1

Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 0

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

Add '-4' to each side of the equation.
4 + -4 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-1, 4}

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