18x=-x^2-81

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Solution for 18x=-x^2-81 equation:


Simplifying
18x = -1x2 + -81

Reorder the terms:
18x = -81 + -1x2

Solving
18x = -81 + -1x2

Solving for variable 'x'.

Reorder the terms:
81 + 18x + x2 = -81 + -1x2 + 81 + x2

Reorder the terms:
81 + 18x + x2 = -81 + 81 + -1x2 + x2

Combine like terms: -81 + 81 = 0
81 + 18x + x2 = 0 + -1x2 + x2
81 + 18x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
81 + 18x + x2 = 0

Factor a trinomial.
(9 + x)(9 + x) = 0

Subproblem 1

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Subproblem 2

Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9

Solution

x = {-9, -9}

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