0=x(x-7)(x+6)

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Solution for 0=x(x-7)(x+6) equation:


Simplifying
0 = x(x + -7)(x + 6)

Reorder the terms:
0 = x(-7 + x)(x + 6)

Reorder the terms:
0 = x(-7 + x)(6 + x)

Multiply (-7 + x) * (6 + x)
0 = x(-7(6 + x) + x(6 + x))
0 = x((6 * -7 + x * -7) + x(6 + x))
0 = x((-42 + -7x) + x(6 + x))
0 = x(-42 + -7x + (6 * x + x * x))
0 = x(-42 + -7x + (6x + x2))

Combine like terms: -7x + 6x = -1x
0 = x(-42 + -1x + x2)
0 = (-42 * x + -1x * x + x2 * x)
0 = (-42x + -1x2 + x3)

Solving
0 = -42x + -1x2 + x3

Solving for variable 'x'.
Remove the zero:
42x + x2 + -1x3 = -42x + -1x2 + x3 + 42x + x2 + -1x3

Reorder the terms:
42x + x2 + -1x3 = -42x + 42x + -1x2 + x2 + x3 + -1x3

Combine like terms: -42x + 42x = 0
42x + x2 + -1x3 = 0 + -1x2 + x2 + x3 + -1x3
42x + x2 + -1x3 = -1x2 + x2 + x3 + -1x3

Combine like terms: -1x2 + x2 = 0
42x + x2 + -1x3 = 0 + x3 + -1x3
42x + x2 + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
42x + x2 + -1x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(42 + x + -1x2) = 0

Factor a trinomial.
x((7 + -1x)(6 + x)) = 0

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 '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Subproblem 3

Set the factor '(6 + x)' equal to zero and attempt to solve: Simplifying 6 + x = 0 Solving 6 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + x = 0 + -6 x = 0 + -6 Combine like terms: 0 + -6 = -6 x = -6 Simplifying x = -6

Solution

x = {0, 7, -6}

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