3X^2-42X=-144

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Solution for 3X^2-42X=-144 equation:


Simplifying
3X2 + -42X = -144

Reorder the terms:
-42X + 3X2 = -144

Solving
-42X + 3X2 = -144

Solving for variable 'X'.

Reorder the terms:
144 + -42X + 3X2 = -144 + 144

Combine like terms: -144 + 144 = 0
144 + -42X + 3X2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(48 + -14X + X2) = 0

Factor a trinomial.
3((6 + -1X)(8 + -1X)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(6 + -1X)' equal to zero and attempt to solve: Simplifying 6 + -1X = 0 Solving 6 + -1X = 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 + -1X = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1X = 0 + -6 -1X = 0 + -6 Combine like terms: 0 + -6 = -6 -1X = -6 Divide each side by '-1'. X = 6 Simplifying X = 6

Subproblem 2

Set the factor '(8 + -1X)' equal to zero and attempt to solve: Simplifying 8 + -1X = 0 Solving 8 + -1X = 0 Move all terms containing X to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1X = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1X = 0 + -8 -1X = 0 + -8 Combine like terms: 0 + -8 = -8 -1X = -8 Divide each side by '-1'. X = 8 Simplifying X = 8

Solution

X = {6, 8}

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