9x^2-3x-13=-7

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Solution for 9x^2-3x-13=-7 equation:


Simplifying
9x2 + -3x + -13 = -7

Reorder the terms:
-13 + -3x + 9x2 = -7

Solving
-13 + -3x + 9x2 = -7

Solving for variable 'x'.

Reorder the terms:
-13 + 7 + -3x + 9x2 = -7 + 7

Combine like terms: -13 + 7 = -6
-6 + -3x + 9x2 = -7 + 7

Combine like terms: -7 + 7 = 0
-6 + -3x + 9x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-2 + -1x + 3x2) = 0

Factor a trinomial.
3((-2 + -3x)(1 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -3x)' equal to zero and attempt to solve: Simplifying -2 + -3x = 0 Solving -2 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -3x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3x = 0 + 2 -3x = 0 + 2 Combine like terms: 0 + 2 = 2 -3x = 2 Divide each side by '-3'. x = -0.6666666667 Simplifying x = -0.6666666667

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 = {-0.6666666667, 1}

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