12x^2=21x-9

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Solution for 12x^2=21x-9 equation:


Simplifying
12x2 = 21x + -9

Reorder the terms:
12x2 = -9 + 21x

Solving
12x2 = -9 + 21x

Solving for variable 'x'.

Reorder the terms:
9 + -21x + 12x2 = -9 + 21x + 9 + -21x

Reorder the terms:
9 + -21x + 12x2 = -9 + 9 + 21x + -21x

Combine like terms: -9 + 9 = 0
9 + -21x + 12x2 = 0 + 21x + -21x
9 + -21x + 12x2 = 21x + -21x

Combine like terms: 21x + -21x = 0
9 + -21x + 12x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(3 + -7x + 4x2) = 0

Factor a trinomial.
3((3 + -4x)(1 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(3 + -4x)' equal to zero and attempt to solve: Simplifying 3 + -4x = 0 Solving 3 + -4x = 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 + -4x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4x = 0 + -3 -4x = 0 + -3 Combine like terms: 0 + -3 = -3 -4x = -3 Divide each side by '-4'. x = 0.75 Simplifying x = 0.75

Subproblem 2

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

Solution

x = {0.75, 1}

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