0=(8x+9)(x-3)

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Solution for 0=(8x+9)(x-3) equation:


Simplifying
0 = (8x + 9)(x + -3)

Reorder the terms:
0 = (9 + 8x)(x + -3)

Reorder the terms:
0 = (9 + 8x)(-3 + x)

Multiply (9 + 8x) * (-3 + x)
0 = (9(-3 + x) + 8x * (-3 + x))
0 = ((-3 * 9 + x * 9) + 8x * (-3 + x))
0 = ((-27 + 9x) + 8x * (-3 + x))
0 = (-27 + 9x + (-3 * 8x + x * 8x))
0 = (-27 + 9x + (-24x + 8x2))

Combine like terms: 9x + -24x = -15x
0 = (-27 + -15x + 8x2)

Solving
0 = -27 + -15x + 8x2

Solving for variable 'x'.

Combine like terms: 0 + 27 = 27
27 + 15x + -8x2 = -27 + -15x + 8x2 + 27 + 15x + -8x2

Reorder the terms:
27 + 15x + -8x2 = -27 + 27 + -15x + 15x + 8x2 + -8x2

Combine like terms: -27 + 27 = 0
27 + 15x + -8x2 = 0 + -15x + 15x + 8x2 + -8x2
27 + 15x + -8x2 = -15x + 15x + 8x2 + -8x2

Combine like terms: -15x + 15x = 0
27 + 15x + -8x2 = 0 + 8x2 + -8x2
27 + 15x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
27 + 15x + -8x2 = 0

Factor a trinomial.
(3 + -1x)(9 + 8x) = 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 '(9 + 8x)' equal to zero and attempt to solve: Simplifying 9 + 8x = 0 Solving 9 + 8x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 8x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 8x = 0 + -9 8x = 0 + -9 Combine like terms: 0 + -9 = -9 8x = -9 Divide each side by '8'. x = -1.125 Simplifying x = -1.125

Solution

x = {3, -1.125}

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