3x(x+10)=168

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Solution for 3x(x+10)=168 equation:


Simplifying
3x(x + 10) = 168

Reorder the terms:
3x(10 + x) = 168
(10 * 3x + x * 3x) = 168
(30x + 3x2) = 168

Solving
30x + 3x2 = 168

Solving for variable 'x'.

Reorder the terms:
-168 + 30x + 3x2 = 168 + -168

Combine like terms: 168 + -168 = 0
-168 + 30x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-56 + 10x + x2) = 0

Factor a trinomial.
3((-14 + -1x)(4 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

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 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-14, 4}

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