168x^2-686x-315=0

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Solution for 168x^2-686x-315=0 equation:


Simplifying
168x2 + -686x + -315 = 0

Reorder the terms:
-315 + -686x + 168x2 = 0

Solving
-315 + -686x + 168x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '7'.
7(-45 + -98x + 24x2) = 0

Factor a trinomial.
7((-5 + -12x)(9 + -2x)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(-5 + -12x)' equal to zero and attempt to solve: Simplifying -5 + -12x = 0 Solving -5 + -12x = 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 + -12x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -12x = 0 + 5 -12x = 0 + 5 Combine like terms: 0 + 5 = 5 -12x = 5 Divide each side by '-12'. x = -0.4166666667 Simplifying x = -0.4166666667

Subproblem 2

Set the factor '(9 + -2x)' equal to zero and attempt to solve: Simplifying 9 + -2x = 0 Solving 9 + -2x = 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 + -2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -2x = 0 + -9 -2x = 0 + -9 Combine like terms: 0 + -9 = -9 -2x = -9 Divide each side by '-2'. x = 4.5 Simplifying x = 4.5

Solution

x = {-0.4166666667, 4.5}

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