(7x-7)(x+5)=

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Solution for (7x-7)(x+5)= equation:


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

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

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

Multiply (-7 + 7x) * (5 + x)
(-7(5 + x) + 7x * (5 + x)) = 0
((5 * -7 + x * -7) + 7x * (5 + x)) = 0
((-35 + -7x) + 7x * (5 + x)) = 0
(-35 + -7x + (5 * 7x + x * 7x)) = 0
(-35 + -7x + (35x + 7x2)) = 0

Combine like terms: -7x + 35x = 28x
(-35 + 28x + 7x2) = 0

Solving
-35 + 28x + 7x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '7'.
7(-5 + 4x + x2) = 0

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

Ignore the factor 7.

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 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 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 2

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

Solution

x = {-5, 1}

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