r^2+13r=-30

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Solution for r^2+13r=-30 equation:


Simplifying
r2 + 13r = -30

Reorder the terms:
13r + r2 = -30

Solving
13r + r2 = -30

Solving for variable 'r'.

Reorder the terms:
30 + 13r + r2 = -30 + 30

Combine like terms: -30 + 30 = 0
30 + 13r + r2 = 0

Factor a trinomial.
(10 + r)(3 + r) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(3 + r)' equal to zero and attempt to solve: Simplifying 3 + r = 0 Solving 3 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + r = 0 + -3 Combine like terms: 3 + -3 = 0 0 + r = 0 + -3 r = 0 + -3 Combine like terms: 0 + -3 = -3 r = -3 Simplifying r = -3

Solution

r = {-10, -3}

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