x(x+20)=-100

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Solution for x(x+20)=-100 equation:


Simplifying
x(x + 20) = -100

Reorder the terms:
x(20 + x) = -100
(20 * x + x * x) = -100
(20x + x2) = -100

Solving
20x + x2 = -100

Solving for variable 'x'.

Reorder the terms:
100 + 20x + x2 = -100 + 100

Combine like terms: -100 + 100 = 0
100 + 20x + x2 = 0

Factor a trinomial.
(10 + x)(10 + x) = 0

Subproblem 1

Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10

Subproblem 2

Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10

Solution

x = {-10, -10}

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