4b^2-12b=-9

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Solution for 4b^2-12b=-9 equation:


Simplifying
4b2 + -12b = -9

Reorder the terms:
-12b + 4b2 = -9

Solving
-12b + 4b2 = -9

Solving for variable 'b'.

Reorder the terms:
9 + -12b + 4b2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + -12b + 4b2 = 0

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

Subproblem 1

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

Subproblem 2

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

Solution

b = {1.5, 1.5}

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