(6x^2-6x+28)+(3x^2+9-85)=

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Solution for (6x^2-6x+28)+(3x^2+9-85)= equation:


Simplifying
(6x2 + -6x + 28) + (3x2 + 9 + -85) = 0

Reorder the terms:
(28 + -6x + 6x2) + (3x2 + 9 + -85) = 0

Remove parenthesis around (28 + -6x + 6x2)
28 + -6x + 6x2 + (3x2 + 9 + -85) = 0

Reorder the terms:
28 + -6x + 6x2 + (9 + -85 + 3x2) = 0

Combine like terms: 9 + -85 = -76
28 + -6x + 6x2 + (-76 + 3x2) = 0

Remove parenthesis around (-76 + 3x2)
28 + -6x + 6x2 + -76 + 3x2 = 0

Reorder the terms:
28 + -76 + -6x + 6x2 + 3x2 = 0

Combine like terms: 28 + -76 = -48
-48 + -6x + 6x2 + 3x2 = 0

Combine like terms: 6x2 + 3x2 = 9x2
-48 + -6x + 9x2 = 0

Solving
-48 + -6x + 9x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-16 + -2x + 3x2) = 0

Factor a trinomial.
3((-2 + -1x)(8 + -3x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2

Subproblem 2

Set the factor '(8 + -3x)' equal to zero and attempt to solve: Simplifying 8 + -3x = 0 Solving 8 + -3x = 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 + -3x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -3x = 0 + -8 -3x = 0 + -8 Combine like terms: 0 + -8 = -8 -3x = -8 Divide each side by '-3'. x = 2.666666667 Simplifying x = 2.666666667

Solution

x = {-2, 2.666666667}

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