r^2=160-12r

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Solution for r^2=160-12r equation:


Simplifying
r2 = 160 + -12r

Solving
r2 = 160 + -12r

Solving for variable 'r'.

Reorder the terms:
-160 + 12r + r2 = 160 + -12r + -160 + 12r

Reorder the terms:
-160 + 12r + r2 = 160 + -160 + -12r + 12r

Combine like terms: 160 + -160 = 0
-160 + 12r + r2 = 0 + -12r + 12r
-160 + 12r + r2 = -12r + 12r

Combine like terms: -12r + 12r = 0
-160 + 12r + r2 = 0

Factor a trinomial.
(-20 + -1r)(8 + -1r) = 0

Subproblem 1

Set the factor '(-20 + -1r)' equal to zero and attempt to solve: Simplifying -20 + -1r = 0 Solving -20 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -1r = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -1r = 0 + 20 -1r = 0 + 20 Combine like terms: 0 + 20 = 20 -1r = 20 Divide each side by '-1'. r = -20 Simplifying r = -20

Subproblem 2

Set the factor '(8 + -1r)' equal to zero and attempt to solve: Simplifying 8 + -1r = 0 Solving 8 + -1r = 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 + -1r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1r = 0 + -8 -1r = 0 + -8 Combine like terms: 0 + -8 = -8 -1r = -8 Divide each side by '-1'. r = 8 Simplifying r = 8

Solution

r = {-20, 8}

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