8x^2-6x-105=2x^2+3x

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Solution for 8x^2-6x-105=2x^2+3x equation:


Simplifying
8x2 + -6x + -105 = 2x2 + 3x

Reorder the terms:
-105 + -6x + 8x2 = 2x2 + 3x

Reorder the terms:
-105 + -6x + 8x2 = 3x + 2x2

Solving
-105 + -6x + 8x2 = 3x + 2x2

Solving for variable 'x'.

Reorder the terms:
-105 + -6x + -3x + 8x2 + -2x2 = 3x + 2x2 + -3x + -2x2

Combine like terms: -6x + -3x = -9x
-105 + -9x + 8x2 + -2x2 = 3x + 2x2 + -3x + -2x2

Combine like terms: 8x2 + -2x2 = 6x2
-105 + -9x + 6x2 = 3x + 2x2 + -3x + -2x2

Reorder the terms:
-105 + -9x + 6x2 = 3x + -3x + 2x2 + -2x2

Combine like terms: 3x + -3x = 0
-105 + -9x + 6x2 = 0 + 2x2 + -2x2
-105 + -9x + 6x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-105 + -9x + 6x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-35 + -3x + 2x2) = 0

Factor a trinomial.
3((-7 + -2x)(5 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-7 + -2x)' equal to zero and attempt to solve: Simplifying -7 + -2x = 0 Solving -7 + -2x = 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 + -2x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -2x = 0 + 7 -2x = 0 + 7 Combine like terms: 0 + 7 = 7 -2x = 7 Divide each side by '-2'. x = -3.5 Simplifying x = -3.5

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 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 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {-3.5, 5}

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