x^2=-13x-42

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Solution for x^2=-13x-42 equation:


Simplifying
x2 = -13x + -42

Reorder the terms:
x2 = -42 + -13x

Solving
x2 = -42 + -13x

Solving for variable 'x'.

Reorder the terms:
42 + 13x + x2 = -42 + -13x + 42 + 13x

Reorder the terms:
42 + 13x + x2 = -42 + 42 + -13x + 13x

Combine like terms: -42 + 42 = 0
42 + 13x + x2 = 0 + -13x + 13x
42 + 13x + x2 = -13x + 13x

Combine like terms: -13x + 13x = 0
42 + 13x + x2 = 0

Factor a trinomial.
(7 + x)(6 + x) = 0

Subproblem 1

Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 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 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(6 + x)' equal to zero and attempt to solve: Simplifying 6 + x = 0 Solving 6 + x = 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 + x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + x = 0 + -6 x = 0 + -6 Combine like terms: 0 + -6 = -6 x = -6 Simplifying x = -6

Solution

x = {-7, -6}

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