4x^2+12x+9-5x^2=20

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Solution for 4x^2+12x+9-5x^2=20 equation:


Simplifying
4x2 + 12x + 9 + -5x2 = 20

Reorder the terms:
9 + 12x + 4x2 + -5x2 = 20

Combine like terms: 4x2 + -5x2 = -1x2
9 + 12x + -1x2 = 20

Solving
9 + 12x + -1x2 = 20

Solving for variable 'x'.

Reorder the terms:
9 + -20 + 12x + -1x2 = 20 + -20

Combine like terms: 9 + -20 = -11
-11 + 12x + -1x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-11 + 12x + -1x2 = 0

Factor a trinomial.
(-11 + x)(1 + -1x) = 0

Subproblem 1

Set the factor '(-11 + x)' equal to zero and attempt to solve: Simplifying -11 + x = 0 Solving -11 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = 0 + 11 Combine like terms: -11 + 11 = 0 0 + x = 0 + 11 x = 0 + 11 Combine like terms: 0 + 11 = 11 x = 11 Simplifying x = 11

Subproblem 2

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

Solution

x = {11, 1}

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