f(0)=9x(x-14)(x+10)

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Solution for f(0)=9x(x-14)(x+10) equation:


Simplifying
f(0) = 9x(x + -14)(x + 10)

Reorder the terms for easier multiplication:
0f = 9x(x + -14)(x + 10)

Anything times zero is zero.
0f = 9x(x + -14)(x + 10)

Reorder the terms:
0 = 9x(-14 + x)(x + 10)

Reorder the terms:
0 = 9x(-14 + x)(10 + x)

Multiply (-14 + x) * (10 + x)
0 = 9x(-14(10 + x) + x(10 + x))
0 = 9x((10 * -14 + x * -14) + x(10 + x))
0 = 9x((-140 + -14x) + x(10 + x))
0 = 9x(-140 + -14x + (10 * x + x * x))
0 = 9x(-140 + -14x + (10x + x2))

Combine like terms: -14x + 10x = -4x
0 = 9x(-140 + -4x + x2)
0 = (-140 * 9x + -4x * 9x + x2 * 9x)
0 = (-1260x + -36x2 + 9x3)

Solving
0 = -1260x + -36x2 + 9x3

Solving for variable 'x'.
Remove the zero:
1260x + 36x2 + -9x3 = -1260x + -36x2 + 9x3 + 1260x + 36x2 + -9x3

Reorder the terms:
1260x + 36x2 + -9x3 = -1260x + 1260x + -36x2 + 36x2 + 9x3 + -9x3

Combine like terms: -1260x + 1260x = 0
1260x + 36x2 + -9x3 = 0 + -36x2 + 36x2 + 9x3 + -9x3
1260x + 36x2 + -9x3 = -36x2 + 36x2 + 9x3 + -9x3

Combine like terms: -36x2 + 36x2 = 0
1260x + 36x2 + -9x3 = 0 + 9x3 + -9x3
1260x + 36x2 + -9x3 = 9x3 + -9x3

Combine like terms: 9x3 + -9x3 = 0
1260x + 36x2 + -9x3 = 0

Factor out the Greatest Common Factor (GCF), '9x'.
9x(140 + 4x + -1x2) = 0

Factor a trinomial.
9x((14 + -1x)(10 + x)) = 0

Ignore the factor 9.

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 '(14 + -1x)' equal to zero and attempt to solve: Simplifying 14 + -1x = 0 Solving 14 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + -1x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -1x = 0 + -14 -1x = 0 + -14 Combine like terms: 0 + -14 = -14 -1x = -14 Divide each side by '-1'. x = 14 Simplifying x = 14

Subproblem 3

Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10

Solution

x = {0, 14, -10}

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