2r^2=8r+192

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Solution for 2r^2=8r+192 equation:


Simplifying
2r2 = 8r + 192

Reorder the terms:
2r2 = 192 + 8r

Solving
2r2 = 192 + 8r

Solving for variable 'r'.

Reorder the terms:
-192 + -8r + 2r2 = 192 + 8r + -192 + -8r

Reorder the terms:
-192 + -8r + 2r2 = 192 + -192 + 8r + -8r

Combine like terms: 192 + -192 = 0
-192 + -8r + 2r2 = 0 + 8r + -8r
-192 + -8r + 2r2 = 8r + -8r

Combine like terms: 8r + -8r = 0
-192 + -8r + 2r2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-96 + -4r + r2) = 0

Factor a trinomial.
2((-8 + -1r)(12 + -1r)) = 0

Ignore the factor 2.

Subproblem 1

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

Subproblem 2

Set the factor '(12 + -1r)' equal to zero and attempt to solve: Simplifying 12 + -1r = 0 Solving 12 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1r = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1r = 0 + -12 -1r = 0 + -12 Combine like terms: 0 + -12 = -12 -1r = -12 Divide each side by '-1'. r = 12 Simplifying r = 12

Solution

r = {-8, 12}

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