4x^2-6x-1=9

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Solution for 4x^2-6x-1=9 equation:


Simplifying
4x2 + -6x + -1 = 9

Reorder the terms:
-1 + -6x + 4x2 = 9

Solving
-1 + -6x + 4x2 = 9

Solving for variable 'x'.

Reorder the terms:
-1 + -9 + -6x + 4x2 = 9 + -9

Combine like terms: -1 + -9 = -10
-10 + -6x + 4x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-10 + -6x + 4x2 = 0

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

Factor a trinomial.
2((-1 + -1x)(5 + -2x)) = 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 '(5 + -2x)' equal to zero and attempt to solve: Simplifying 5 + -2x = 0 Solving 5 + -2x = 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 + -2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2x = 0 + -5 -2x = 0 + -5 Combine like terms: 0 + -5 = -5 -2x = -5 Divide each side by '-2'. x = 2.5 Simplifying x = 2.5

Solution

x = {-1, 2.5}

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