3(x+5)(x-5)-12=5(3x+3)-60

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Solution for 3(x+5)(x-5)-12=5(3x+3)-60 equation:


Simplifying
3(x + 5)(x + -5) + -12 = 5(3x + 3) + -60

Reorder the terms:
3(5 + x)(x + -5) + -12 = 5(3x + 3) + -60

Reorder the terms:
3(5 + x)(-5 + x) + -12 = 5(3x + 3) + -60

Multiply (5 + x) * (-5 + x)
3(5(-5 + x) + x(-5 + x)) + -12 = 5(3x + 3) + -60
3((-5 * 5 + x * 5) + x(-5 + x)) + -12 = 5(3x + 3) + -60
3((-25 + 5x) + x(-5 + x)) + -12 = 5(3x + 3) + -60
3(-25 + 5x + (-5 * x + x * x)) + -12 = 5(3x + 3) + -60
3(-25 + 5x + (-5x + x2)) + -12 = 5(3x + 3) + -60

Combine like terms: 5x + -5x = 0
3(-25 + 0 + x2) + -12 = 5(3x + 3) + -60
3(-25 + x2) + -12 = 5(3x + 3) + -60
(-25 * 3 + x2 * 3) + -12 = 5(3x + 3) + -60
(-75 + 3x2) + -12 = 5(3x + 3) + -60

Reorder the terms:
-75 + -12 + 3x2 = 5(3x + 3) + -60

Combine like terms: -75 + -12 = -87
-87 + 3x2 = 5(3x + 3) + -60

Reorder the terms:
-87 + 3x2 = 5(3 + 3x) + -60
-87 + 3x2 = (3 * 5 + 3x * 5) + -60
-87 + 3x2 = (15 + 15x) + -60

Reorder the terms:
-87 + 3x2 = 15 + -60 + 15x

Combine like terms: 15 + -60 = -45
-87 + 3x2 = -45 + 15x

Solving
-87 + 3x2 = -45 + 15x

Solving for variable 'x'.

Reorder the terms:
-87 + 45 + -15x + 3x2 = -45 + 15x + 45 + -15x

Combine like terms: -87 + 45 = -42
-42 + -15x + 3x2 = -45 + 15x + 45 + -15x

Reorder the terms:
-42 + -15x + 3x2 = -45 + 45 + 15x + -15x

Combine like terms: -45 + 45 = 0
-42 + -15x + 3x2 = 0 + 15x + -15x
-42 + -15x + 3x2 = 15x + -15x

Combine like terms: 15x + -15x = 0
-42 + -15x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-14 + -5x + x2) = 0

Factor a trinomial.
3((-2 + -1x)(7 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2

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 = {-2, 7}

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