2r^2+17r=-8

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Solution for 2r^2+17r=-8 equation:


Simplifying
2r2 + 17r = -8

Reorder the terms:
17r + 2r2 = -8

Solving
17r + 2r2 = -8

Solving for variable 'r'.

Reorder the terms:
8 + 17r + 2r2 = -8 + 8

Combine like terms: -8 + 8 = 0
8 + 17r + 2r2 = 0

Factor a trinomial.
(8 + r)(1 + 2r) = 0

Subproblem 1

Set the factor '(8 + r)' equal to zero and attempt to solve: Simplifying 8 + r = 0 Solving 8 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + r = 0 + -8 r = 0 + -8 Combine like terms: 0 + -8 = -8 r = -8 Simplifying r = -8

Subproblem 2

Set the factor '(1 + 2r)' equal to zero and attempt to solve: Simplifying 1 + 2r = 0 Solving 1 + 2r = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 2r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2r = 0 + -1 2r = 0 + -1 Combine like terms: 0 + -1 = -1 2r = -1 Divide each side by '2'. r = -0.5 Simplifying r = -0.5

Solution

r = {-8, -0.5}

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