4r^2+12r+9=

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Solution for 4r^2+12r+9= equation:


Simplifying
4r2 + 12r + 9 = 0

Reorder the terms:
9 + 12r + 4r2 = 0

Solving
9 + 12r + 4r2 = 0

Solving for variable 'r'.

Factor a trinomial.
(3 + 2r)(3 + 2r) = 0

Subproblem 1

Set the factor '(3 + 2r)' equal to zero and attempt to solve: Simplifying 3 + 2r = 0 Solving 3 + 2r = 0 Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2r = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2r = 0 + -3 2r = 0 + -3 Combine like terms: 0 + -3 = -3 2r = -3 Divide each side by '2'. r = -1.5 Simplifying r = -1.5

Subproblem 2

Set the factor '(3 + 2r)' equal to zero and attempt to solve: Simplifying 3 + 2r = 0 Solving 3 + 2r = 0 Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2r = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2r = 0 + -3 2r = 0 + -3 Combine like terms: 0 + -3 = -3 2r = -3 Divide each side by '2'. r = -1.5 Simplifying r = -1.5

Solution

r = {-1.5, -1.5}

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