3x(x-9)=15x^2+28x

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Solution for 3x(x-9)=15x^2+28x equation:


Simplifying
3x(x + -9) = 15x2 + 28x

Reorder the terms:
3x(-9 + x) = 15x2 + 28x
(-9 * 3x + x * 3x) = 15x2 + 28x
(-27x + 3x2) = 15x2 + 28x

Reorder the terms:
-27x + 3x2 = 28x + 15x2

Solving
-27x + 3x2 = 28x + 15x2

Solving for variable 'x'.

Reorder the terms:
-27x + -28x + 3x2 + -15x2 = 28x + 15x2 + -28x + -15x2

Combine like terms: -27x + -28x = -55x
-55x + 3x2 + -15x2 = 28x + 15x2 + -28x + -15x2

Combine like terms: 3x2 + -15x2 = -12x2
-55x + -12x2 = 28x + 15x2 + -28x + -15x2

Reorder the terms:
-55x + -12x2 = 28x + -28x + 15x2 + -15x2

Combine like terms: 28x + -28x = 0
-55x + -12x2 = 0 + 15x2 + -15x2
-55x + -12x2 = 15x2 + -15x2

Combine like terms: 15x2 + -15x2 = 0
-55x + -12x2 = 0

Factor out the Greatest Common Factor (GCF), '-1x'.
-1x(55 + 12x) = 0

Ignore the factor -1.

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 '(55 + 12x)' equal to zero and attempt to solve: Simplifying 55 + 12x = 0 Solving 55 + 12x = 0 Move all terms containing x to the left, all other terms to the right. Add '-55' to each side of the equation. 55 + -55 + 12x = 0 + -55 Combine like terms: 55 + -55 = 0 0 + 12x = 0 + -55 12x = 0 + -55 Combine like terms: 0 + -55 = -55 12x = -55 Divide each side by '12'. x = -4.583333333 Simplifying x = -4.583333333

Solution

x = {0, -4.583333333}

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