0=2x^2-3x-9

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Solution for 0=2x^2-3x-9 equation:


Simplifying
0 = 2x2 + -3x + -9

Reorder the terms:
0 = -9 + -3x + 2x2

Solving
0 = -9 + -3x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + 9 = 9
9 + 3x + -2x2 = -9 + -3x + 2x2 + 9 + 3x + -2x2

Reorder the terms:
9 + 3x + -2x2 = -9 + 9 + -3x + 3x + 2x2 + -2x2

Combine like terms: -9 + 9 = 0
9 + 3x + -2x2 = 0 + -3x + 3x + 2x2 + -2x2
9 + 3x + -2x2 = -3x + 3x + 2x2 + -2x2

Combine like terms: -3x + 3x = 0
9 + 3x + -2x2 = 0 + 2x2 + -2x2
9 + 3x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
9 + 3x + -2x2 = 0

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

Subproblem 1

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 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 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

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 = {3, -1.5}

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