-4r^2-83r+83=-12r-11r^2+11

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Solution for -4r^2-83r+83=-12r-11r^2+11 equation:


Simplifying
-4r2 + -83r + 83 = -12r + -11r2 + 11

Reorder the terms:
83 + -83r + -4r2 = -12r + -11r2 + 11

Reorder the terms:
83 + -83r + -4r2 = 11 + -12r + -11r2

Solving
83 + -83r + -4r2 = 11 + -12r + -11r2

Solving for variable 'r'.

Reorder the terms:
83 + -11 + -83r + 12r + -4r2 + 11r2 = 11 + -12r + -11r2 + -11 + 12r + 11r2

Combine like terms: 83 + -11 = 72
72 + -83r + 12r + -4r2 + 11r2 = 11 + -12r + -11r2 + -11 + 12r + 11r2

Combine like terms: -83r + 12r = -71r
72 + -71r + -4r2 + 11r2 = 11 + -12r + -11r2 + -11 + 12r + 11r2

Combine like terms: -4r2 + 11r2 = 7r2
72 + -71r + 7r2 = 11 + -12r + -11r2 + -11 + 12r + 11r2

Reorder the terms:
72 + -71r + 7r2 = 11 + -11 + -12r + 12r + -11r2 + 11r2

Combine like terms: 11 + -11 = 0
72 + -71r + 7r2 = 0 + -12r + 12r + -11r2 + 11r2
72 + -71r + 7r2 = -12r + 12r + -11r2 + 11r2

Combine like terms: -12r + 12r = 0
72 + -71r + 7r2 = 0 + -11r2 + 11r2
72 + -71r + 7r2 = -11r2 + 11r2

Combine like terms: -11r2 + 11r2 = 0
72 + -71r + 7r2 = 0

Factor a trinomial.
(8 + -7r)(9 + -1r) = 0

Subproblem 1

Set the factor '(8 + -7r)' equal to zero and attempt to solve: Simplifying 8 + -7r = 0 Solving 8 + -7r = 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 + -7r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -7r = 0 + -8 -7r = 0 + -8 Combine like terms: 0 + -8 = -8 -7r = -8 Divide each side by '-7'. r = 1.142857143 Simplifying r = 1.142857143

Subproblem 2

Set the factor '(9 + -1r)' equal to zero and attempt to solve: Simplifying 9 + -1r = 0 Solving 9 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1r = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1r = 0 + -9 -1r = 0 + -9 Combine like terms: 0 + -9 = -9 -1r = -9 Divide each side by '-1'. r = 9 Simplifying r = 9

Solution

r = {1.142857143, 9}

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