4x^2+6x+21=3x^2+20x-27

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Solution for 4x^2+6x+21=3x^2+20x-27 equation:


Simplifying
4x2 + 6x + 21 = 3x2 + 20x + -27

Reorder the terms:
21 + 6x + 4x2 = 3x2 + 20x + -27

Reorder the terms:
21 + 6x + 4x2 = -27 + 20x + 3x2

Solving
21 + 6x + 4x2 = -27 + 20x + 3x2

Solving for variable 'x'.

Reorder the terms:
21 + 27 + 6x + -20x + 4x2 + -3x2 = -27 + 20x + 3x2 + 27 + -20x + -3x2

Combine like terms: 21 + 27 = 48
48 + 6x + -20x + 4x2 + -3x2 = -27 + 20x + 3x2 + 27 + -20x + -3x2

Combine like terms: 6x + -20x = -14x
48 + -14x + 4x2 + -3x2 = -27 + 20x + 3x2 + 27 + -20x + -3x2

Combine like terms: 4x2 + -3x2 = 1x2
48 + -14x + 1x2 = -27 + 20x + 3x2 + 27 + -20x + -3x2

Reorder the terms:
48 + -14x + 1x2 = -27 + 27 + 20x + -20x + 3x2 + -3x2

Combine like terms: -27 + 27 = 0
48 + -14x + 1x2 = 0 + 20x + -20x + 3x2 + -3x2
48 + -14x + 1x2 = 20x + -20x + 3x2 + -3x2

Combine like terms: 20x + -20x = 0
48 + -14x + 1x2 = 0 + 3x2 + -3x2
48 + -14x + 1x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
48 + -14x + 1x2 = 0

Factor a trinomial.
(6 + -1x)(8 + -1x) = 0

Subproblem 1

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 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 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {6, 8}

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