4r^2+12r-109=3

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Solution for 4r^2+12r-109=3 equation:


Simplifying
4r2 + 12r + -109 = 3

Reorder the terms:
-109 + 12r + 4r2 = 3

Solving
-109 + 12r + 4r2 = 3

Solving for variable 'r'.

Reorder the terms:
-109 + -3 + 12r + 4r2 = 3 + -3

Combine like terms: -109 + -3 = -112
-112 + 12r + 4r2 = 3 + -3

Combine like terms: 3 + -3 = 0
-112 + 12r + 4r2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-28 + 3r + r2) = 0

Factor a trinomial.
4((-7 + -1r)(4 + -1r)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-7 + -1r)' equal to zero and attempt to solve: Simplifying -7 + -1r = 0 Solving -7 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1r = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1r = 0 + 7 -1r = 0 + 7 Combine like terms: 0 + 7 = 7 -1r = 7 Divide each side by '-1'. r = -7 Simplifying r = -7

Subproblem 2

Set the factor '(4 + -1r)' equal to zero and attempt to solve: Simplifying 4 + -1r = 0 Solving 4 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1r = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1r = 0 + -4 -1r = 0 + -4 Combine like terms: 0 + -4 = -4 -1r = -4 Divide each side by '-1'. r = 4 Simplifying r = 4

Solution

r = {-7, 4}

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