0=-x^2-19x-18

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Solution for 0=-x^2-19x-18 equation:


Simplifying
0 = -1x2 + -19x + -18

Reorder the terms:
0 = -18 + -19x + -1x2

Solving
0 = -18 + -19x + -1x2

Solving for variable 'x'.

Combine like terms: 0 + 18 = 18
18 + 19x + x2 = -18 + -19x + -1x2 + 18 + 19x + x2

Reorder the terms:
18 + 19x + x2 = -18 + 18 + -19x + 19x + -1x2 + x2

Combine like terms: -18 + 18 = 0
18 + 19x + x2 = 0 + -19x + 19x + -1x2 + x2
18 + 19x + x2 = -19x + 19x + -1x2 + x2

Combine like terms: -19x + 19x = 0
18 + 19x + x2 = 0 + -1x2 + x2
18 + 19x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
18 + 19x + x2 = 0

Factor a trinomial.
(18 + x)(1 + x) = 0

Subproblem 1

Set the factor '(18 + x)' equal to zero and attempt to solve: Simplifying 18 + x = 0 Solving 18 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + x = 0 + -18 Combine like terms: 18 + -18 = 0 0 + x = 0 + -18 x = 0 + -18 Combine like terms: 0 + -18 = -18 x = -18 Simplifying x = -18

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 = {-18, -1}

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