4x^2+15x=2x^2+9x

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Solution for 4x^2+15x=2x^2+9x equation:


Simplifying
4x2 + 15x = 2x2 + 9x

Reorder the terms:
15x + 4x2 = 2x2 + 9x

Reorder the terms:
15x + 4x2 = 9x + 2x2

Solving
15x + 4x2 = 9x + 2x2

Solving for variable 'x'.

Reorder the terms:
15x + -9x + 4x2 + -2x2 = 9x + 2x2 + -9x + -2x2

Combine like terms: 15x + -9x = 6x
6x + 4x2 + -2x2 = 9x + 2x2 + -9x + -2x2

Combine like terms: 4x2 + -2x2 = 2x2
6x + 2x2 = 9x + 2x2 + -9x + -2x2

Reorder the terms:
6x + 2x2 = 9x + -9x + 2x2 + -2x2

Combine like terms: 9x + -9x = 0
6x + 2x2 = 0 + 2x2 + -2x2
6x + 2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
6x + 2x2 = 0

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

Ignore the factor 2.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

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

Solution

x = {0, -3}

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