=(7x+7)(5x-4)

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Solution for =(7x+7)(5x-4) equation:


Simplifying
0 = (7x + 7)(5x + -4)

Reorder the terms:
0 = (7 + 7x)(5x + -4)

Reorder the terms:
0 = (7 + 7x)(-4 + 5x)

Multiply (7 + 7x) * (-4 + 5x)
0 = (7(-4 + 5x) + 7x * (-4 + 5x))
0 = ((-4 * 7 + 5x * 7) + 7x * (-4 + 5x))
0 = ((-28 + 35x) + 7x * (-4 + 5x))
0 = (-28 + 35x + (-4 * 7x + 5x * 7x))
0 = (-28 + 35x + (-28x + 35x2))

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

Solving
0 = -28 + 7x + 35x2

Solving for variable 'x'.

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

Reorder the terms:
28 + -7x + -35x2 = -28 + 28 + 7x + -7x + 35x2 + -35x2

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

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

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

Factor out the Greatest Common Factor (GCF), '7'.
7(4 + -1x + -5x2) = 0

Factor a trinomial.
7((4 + -5x)(1 + x)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(4 + -5x)' equal to zero and attempt to solve: Simplifying 4 + -5x = 0 Solving 4 + -5x = 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 + -5x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -5x = 0 + -4 -5x = 0 + -4 Combine like terms: 0 + -4 = -4 -5x = -4 Divide each side by '-5'. x = 0.8 Simplifying x = 0.8

Subproblem 2

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

Solution

x = {0.8, -1}

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