6x^2-10x-21=-5

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Solution for 6x^2-10x-21=-5 equation:


Simplifying
6x2 + -10x + -21 = -5

Reorder the terms:
-21 + -10x + 6x2 = -5

Solving
-21 + -10x + 6x2 = -5

Solving for variable 'x'.

Reorder the terms:
-21 + 5 + -10x + 6x2 = -5 + 5

Combine like terms: -21 + 5 = -16
-16 + -10x + 6x2 = -5 + 5

Combine like terms: -5 + 5 = 0
-16 + -10x + 6x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-8 + -5x + 3x2) = 0

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

Ignore the factor 2.

Subproblem 1

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

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 = {-1, 2.666666667}

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