(9x+7)(x-7)=0

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Solution for (9x+7)(x-7)=0 equation:


Simplifying
(9x + 7)(x + -7) = 0

Reorder the terms:
(7 + 9x)(x + -7) = 0

Reorder the terms:
(7 + 9x)(-7 + x) = 0

Multiply (7 + 9x) * (-7 + x)
(7(-7 + x) + 9x * (-7 + x)) = 0
((-7 * 7 + x * 7) + 9x * (-7 + x)) = 0
((-49 + 7x) + 9x * (-7 + x)) = 0
(-49 + 7x + (-7 * 9x + x * 9x)) = 0
(-49 + 7x + (-63x + 9x2)) = 0

Combine like terms: 7x + -63x = -56x
(-49 + -56x + 9x2) = 0

Solving
-49 + -56x + 9x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-7 + -9x)(7 + -1x) = 0

Subproblem 1

Set the factor '(-7 + -9x)' equal to zero and attempt to solve: Simplifying -7 + -9x = 0 Solving -7 + -9x = 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 + -9x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -9x = 0 + 7 -9x = 0 + 7 Combine like terms: 0 + 7 = 7 -9x = 7 Divide each side by '-9'. x = -0.7777777778 Simplifying x = -0.7777777778

Subproblem 2

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

Solution

x = {-0.7777777778, 7}

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