(5x-6)*(5x-6)-81=0

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Solution for (5x-6)*(5x-6)-81=0 equation:


Simplifying
(5x + -6)(5x + -6) + -81 = 0

Reorder the terms:
(-6 + 5x)(5x + -6) + -81 = 0

Reorder the terms:
(-6 + 5x)(-6 + 5x) + -81 = 0

Multiply (-6 + 5x) * (-6 + 5x)
(-6(-6 + 5x) + 5x * (-6 + 5x)) + -81 = 0
((-6 * -6 + 5x * -6) + 5x * (-6 + 5x)) + -81 = 0
((36 + -30x) + 5x * (-6 + 5x)) + -81 = 0
(36 + -30x + (-6 * 5x + 5x * 5x)) + -81 = 0
(36 + -30x + (-30x + 25x2)) + -81 = 0

Combine like terms: -30x + -30x = -60x
(36 + -60x + 25x2) + -81 = 0

Reorder the terms:
36 + -81 + -60x + 25x2 = 0

Combine like terms: 36 + -81 = -45
-45 + -60x + 25x2 = 0

Solving
-45 + -60x + 25x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-9 + -12x + 5x2) = 0

Factor a trinomial.
5((-3 + -5x)(3 + -1x)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-3 + -5x)' equal to zero and attempt to solve: Simplifying -3 + -5x = 0 Solving -3 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -5x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -5x = 0 + 3 -5x = 0 + 3 Combine like terms: 0 + 3 = 3 -5x = 3 Divide each side by '-5'. x = -0.6 Simplifying x = -0.6

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-0.6, 3}

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