(x+6)*x+9=81

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Solution for (x+6)*x+9=81 equation:


Simplifying
(x + 6) * x + 9 = 81

Reorder the terms:
(6 + x) * x + 9 = 81

Reorder the terms for easier multiplication:
x(6 + x) + 9 = 81
(6 * x + x * x) + 9 = 81
(6x + x2) + 9 = 81

Reorder the terms:
9 + 6x + x2 = 81

Solving
9 + 6x + x2 = 81

Solving for variable 'x'.

Reorder the terms:
9 + -81 + 6x + x2 = 81 + -81

Combine like terms: 9 + -81 = -72
-72 + 6x + x2 = 81 + -81

Combine like terms: 81 + -81 = 0
-72 + 6x + x2 = 0

Factor a trinomial.
(-12 + -1x)(6 + -1x) = 0

Subproblem 1

Set the factor '(-12 + -1x)' equal to zero and attempt to solve: Simplifying -12 + -1x = 0 Solving -12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -1x = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -1x = 0 + 12 -1x = 0 + 12 Combine like terms: 0 + 12 = 12 -1x = 12 Divide each side by '-1'. x = -12 Simplifying x = -12

Subproblem 2

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Solution

x = {-12, 6}

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