0=15x^2+66x-45

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Solution for 0=15x^2+66x-45 equation:


Simplifying
0 = 15x2 + 66x + -45

Reorder the terms:
0 = -45 + 66x + 15x2

Solving
0 = -45 + 66x + 15x2

Solving for variable 'x'.

Combine like terms: 0 + 45 = 45
45 + -66x + -15x2 = -45 + 66x + 15x2 + 45 + -66x + -15x2

Reorder the terms:
45 + -66x + -15x2 = -45 + 45 + 66x + -66x + 15x2 + -15x2

Combine like terms: -45 + 45 = 0
45 + -66x + -15x2 = 0 + 66x + -66x + 15x2 + -15x2
45 + -66x + -15x2 = 66x + -66x + 15x2 + -15x2

Combine like terms: 66x + -66x = 0
45 + -66x + -15x2 = 0 + 15x2 + -15x2
45 + -66x + -15x2 = 15x2 + -15x2

Combine like terms: 15x2 + -15x2 = 0
45 + -66x + -15x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(15 + -22x + -5x2) = 0

Factor a trinomial.
3((3 + -5x)(5 + x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(3 + -5x)' equal to zero and attempt to solve: Simplifying 3 + -5x = 0 Solving 3 + -5x = 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 + -5x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -5x = 0 + -3 -5x = 0 + -3 Combine like terms: 0 + -3 = -3 -5x = -3 Divide each side by '-5'. x = 0.6 Simplifying x = 0.6

Subproblem 2

Set the factor '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5

Solution

x = {0.6, -5}

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