4x^2+12x+9=36

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Solution for 4x^2+12x+9=36 equation:


Simplifying
4x2 + 12x + 9 = 36

Reorder the terms:
9 + 12x + 4x2 = 36

Solving
9 + 12x + 4x2 = 36

Solving for variable 'x'.

Reorder the terms:
9 + -36 + 12x + 4x2 = 36 + -36

Combine like terms: 9 + -36 = -27
-27 + 12x + 4x2 = 36 + -36

Combine like terms: 36 + -36 = 0
-27 + 12x + 4x2 = 0

Factor a trinomial.
(-9 + -2x)(3 + -2x) = 0

Subproblem 1

Set the factor '(-9 + -2x)' equal to zero and attempt to solve: Simplifying -9 + -2x = 0 Solving -9 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -2x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -2x = 0 + 9 -2x = 0 + 9 Combine like terms: 0 + 9 = 9 -2x = 9 Divide each side by '-2'. x = -4.5 Simplifying x = -4.5

Subproblem 2

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

Solution

x = {-4.5, 1.5}

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