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

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Solution for 0=3(x-5)(2x+3) equation:


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

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

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

Multiply (-5 + x) * (3 + 2x)
0 = 3(-5(3 + 2x) + x(3 + 2x))
0 = 3((3 * -5 + 2x * -5) + x(3 + 2x))
0 = 3((-15 + -10x) + x(3 + 2x))
0 = 3(-15 + -10x + (3 * x + 2x * x))
0 = 3(-15 + -10x + (3x + 2x2))

Combine like terms: -10x + 3x = -7x
0 = 3(-15 + -7x + 2x2)
0 = (-15 * 3 + -7x * 3 + 2x2 * 3)
0 = (-45 + -21x + 6x2)

Solving
0 = -45 + -21x + 6x2

Solving for variable 'x'.

Combine like terms: 0 + 45 = 45
45 + 21x + -6x2 = -45 + -21x + 6x2 + 45 + 21x + -6x2

Reorder the terms:
45 + 21x + -6x2 = -45 + 45 + -21x + 21x + 6x2 + -6x2

Combine like terms: -45 + 45 = 0
45 + 21x + -6x2 = 0 + -21x + 21x + 6x2 + -6x2
45 + 21x + -6x2 = -21x + 21x + 6x2 + -6x2

Combine like terms: -21x + 21x = 0
45 + 21x + -6x2 = 0 + 6x2 + -6x2
45 + 21x + -6x2 = 6x2 + -6x2

Combine like terms: 6x2 + -6x2 = 0
45 + 21x + -6x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(15 + 7x + -2x2) = 0

Factor a trinomial.
3((5 + -1x)(3 + 2x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 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 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Subproblem 2

Set the factor '(3 + 2x)' equal to zero and attempt to solve: Simplifying 3 + 2x = 0 Solving 3 + 2x = 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 + 2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2x = 0 + -3 2x = 0 + -3 Combine like terms: 0 + -3 = -3 2x = -3 Divide each side by '2'. x = -1.5 Simplifying x = -1.5

Solution

x = {5, -1.5}

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