x(9x+8)=4x^2-3x+36

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Solution for x(9x+8)=4x^2-3x+36 equation:


Simplifying
x(9x + 8) = 4x2 + -3x + 36

Reorder the terms:
x(8 + 9x) = 4x2 + -3x + 36
(8 * x + 9x * x) = 4x2 + -3x + 36
(8x + 9x2) = 4x2 + -3x + 36

Reorder the terms:
8x + 9x2 = 36 + -3x + 4x2

Solving
8x + 9x2 = 36 + -3x + 4x2

Solving for variable 'x'.

Reorder the terms:
-36 + 8x + 3x + 9x2 + -4x2 = 36 + -3x + 4x2 + -36 + 3x + -4x2

Combine like terms: 8x + 3x = 11x
-36 + 11x + 9x2 + -4x2 = 36 + -3x + 4x2 + -36 + 3x + -4x2

Combine like terms: 9x2 + -4x2 = 5x2
-36 + 11x + 5x2 = 36 + -3x + 4x2 + -36 + 3x + -4x2

Reorder the terms:
-36 + 11x + 5x2 = 36 + -36 + -3x + 3x + 4x2 + -4x2

Combine like terms: 36 + -36 = 0
-36 + 11x + 5x2 = 0 + -3x + 3x + 4x2 + -4x2
-36 + 11x + 5x2 = -3x + 3x + 4x2 + -4x2

Combine like terms: -3x + 3x = 0
-36 + 11x + 5x2 = 0 + 4x2 + -4x2
-36 + 11x + 5x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-36 + 11x + 5x2 = 0

Factor a trinomial.
(-4 + -1x)(9 + -5x) = 0

Subproblem 1

Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(9 + -5x)' equal to zero and attempt to solve: Simplifying 9 + -5x = 0 Solving 9 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -5x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -5x = 0 + -9 -5x = 0 + -9 Combine like terms: 0 + -9 = -9 -5x = -9 Divide each side by '-5'. x = 1.8 Simplifying x = 1.8

Solution

x = {-4, 1.8}

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