=(x+3)(2x-5x-9)

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Solution for =(x+3)(2x-5x-9) equation:


Simplifying
0 = (x + 3)(2x + -5x + -9)

Reorder the terms:
0 = (3 + x)(2x + -5x + -9)

Reorder the terms:
0 = (3 + x)(-9 + 2x + -5x)

Combine like terms: 2x + -5x = -3x
0 = (3 + x)(-9 + -3x)

Multiply (3 + x) * (-9 + -3x)
0 = (3(-9 + -3x) + x(-9 + -3x))
0 = ((-9 * 3 + -3x * 3) + x(-9 + -3x))
0 = ((-27 + -9x) + x(-9 + -3x))
0 = (-27 + -9x + (-9 * x + -3x * x))
0 = (-27 + -9x + (-9x + -3x2))

Combine like terms: -9x + -9x = -18x
0 = (-27 + -18x + -3x2)

Solving
0 = -27 + -18x + -3x2

Solving for variable 'x'.

Combine like terms: 0 + 27 = 27
27 + 18x + 3x2 = -27 + -18x + -3x2 + 27 + 18x + 3x2

Reorder the terms:
27 + 18x + 3x2 = -27 + 27 + -18x + 18x + -3x2 + 3x2

Combine like terms: -27 + 27 = 0
27 + 18x + 3x2 = 0 + -18x + 18x + -3x2 + 3x2
27 + 18x + 3x2 = -18x + 18x + -3x2 + 3x2

Combine like terms: -18x + 18x = 0
27 + 18x + 3x2 = 0 + -3x2 + 3x2
27 + 18x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
27 + 18x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(9 + 6x + x2) = 0

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

Ignore the factor 3.

Subproblem 1

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

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 = {-3, -3}

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