(7x-1)(8x+7)=0

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Solution for (7x-1)(8x+7)=0 equation:


Simplifying
(7x + -1)(8x + 7) = 0

Reorder the terms:
(-1 + 7x)(8x + 7) = 0

Reorder the terms:
(-1 + 7x)(7 + 8x) = 0

Multiply (-1 + 7x) * (7 + 8x)
(-1(7 + 8x) + 7x * (7 + 8x)) = 0
((7 * -1 + 8x * -1) + 7x * (7 + 8x)) = 0
((-7 + -8x) + 7x * (7 + 8x)) = 0
(-7 + -8x + (7 * 7x + 8x * 7x)) = 0
(-7 + -8x + (49x + 56x2)) = 0

Combine like terms: -8x + 49x = 41x
(-7 + 41x + 56x2) = 0

Solving
-7 + 41x + 56x2 = 0

Solving for variable 'x'.

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

Subproblem 1

Set the factor '(-7 + -8x)' equal to zero and attempt to solve: Simplifying -7 + -8x = 0 Solving -7 + -8x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -8x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -8x = 0 + 7 -8x = 0 + 7 Combine like terms: 0 + 7 = 7 -8x = 7 Divide each side by '-8'. x = -0.875 Simplifying x = -0.875

Subproblem 2

Set the factor '(1 + -7x)' equal to zero and attempt to solve: Simplifying 1 + -7x = 0 Solving 1 + -7x = 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 + -7x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -7x = 0 + -1 -7x = 0 + -1 Combine like terms: 0 + -1 = -1 -7x = -1 Divide each side by '-7'. x = 0.1428571429 Simplifying x = 0.1428571429

Solution

x = {-0.875, 0.1428571429}

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