(7x+5)(8x+8)=0

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Solution for (7x+5)(8x+8)=0 equation:


Simplifying
(7x + 5)(8x + 8) = 0

Reorder the terms:
(5 + 7x)(8x + 8) = 0

Reorder the terms:
(5 + 7x)(8 + 8x) = 0

Multiply (5 + 7x) * (8 + 8x)
(5(8 + 8x) + 7x * (8 + 8x)) = 0
((8 * 5 + 8x * 5) + 7x * (8 + 8x)) = 0
((40 + 40x) + 7x * (8 + 8x)) = 0
(40 + 40x + (8 * 7x + 8x * 7x)) = 0
(40 + 40x + (56x + 56x2)) = 0

Combine like terms: 40x + 56x = 96x
(40 + 96x + 56x2) = 0

Solving
40 + 96x + 56x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '8'.
8(5 + 12x + 7x2) = 0

Factor a trinomial.
8((1 + x)(5 + 7x)) = 0

Ignore the factor 8.

Subproblem 1

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(5 + 7x)' equal to zero and attempt to solve: Simplifying 5 + 7x = 0 Solving 5 + 7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 7x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 7x = 0 + -5 7x = 0 + -5 Combine like terms: 0 + -5 = -5 7x = -5 Divide each side by '7'. x = -0.7142857143 Simplifying x = -0.7142857143

Solution

x = {-1, -0.7142857143}

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