3x^2-11x-20=2x^2-21x+4

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Solution for 3x^2-11x-20=2x^2-21x+4 equation:


Simplifying
3x2 + -11x + -20 = 2x2 + -21x + 4

Reorder the terms:
-20 + -11x + 3x2 = 2x2 + -21x + 4

Reorder the terms:
-20 + -11x + 3x2 = 4 + -21x + 2x2

Solving
-20 + -11x + 3x2 = 4 + -21x + 2x2

Solving for variable 'x'.

Reorder the terms:
-20 + -4 + -11x + 21x + 3x2 + -2x2 = 4 + -21x + 2x2 + -4 + 21x + -2x2

Combine like terms: -20 + -4 = -24
-24 + -11x + 21x + 3x2 + -2x2 = 4 + -21x + 2x2 + -4 + 21x + -2x2

Combine like terms: -11x + 21x = 10x
-24 + 10x + 3x2 + -2x2 = 4 + -21x + 2x2 + -4 + 21x + -2x2

Combine like terms: 3x2 + -2x2 = 1x2
-24 + 10x + 1x2 = 4 + -21x + 2x2 + -4 + 21x + -2x2

Reorder the terms:
-24 + 10x + 1x2 = 4 + -4 + -21x + 21x + 2x2 + -2x2

Combine like terms: 4 + -4 = 0
-24 + 10x + 1x2 = 0 + -21x + 21x + 2x2 + -2x2
-24 + 10x + 1x2 = -21x + 21x + 2x2 + -2x2

Combine like terms: -21x + 21x = 0
-24 + 10x + 1x2 = 0 + 2x2 + -2x2
-24 + 10x + 1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-24 + 10x + 1x2 = 0

Factor a trinomial.
(-12 + -1x)(2 + -1x) = 0

Subproblem 1

Set the factor '(-12 + -1x)' equal to zero and attempt to solve: Simplifying -12 + -1x = 0 Solving -12 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -1x = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -1x = 0 + 12 -1x = 0 + 12 Combine like terms: 0 + 12 = 12 -1x = 12 Divide each side by '-1'. x = -12 Simplifying x = -12

Subproblem 2

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

Solution

x = {-12, 2}

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