x(5x+8)=2x^2-5x+56

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Solution for x(5x+8)=2x^2-5x+56 equation:


Simplifying
x(5x + 8) = 2x2 + -5x + 56

Reorder the terms:
x(8 + 5x) = 2x2 + -5x + 56
(8 * x + 5x * x) = 2x2 + -5x + 56
(8x + 5x2) = 2x2 + -5x + 56

Reorder the terms:
8x + 5x2 = 56 + -5x + 2x2

Solving
8x + 5x2 = 56 + -5x + 2x2

Solving for variable 'x'.

Reorder the terms:
-56 + 8x + 5x + 5x2 + -2x2 = 56 + -5x + 2x2 + -56 + 5x + -2x2

Combine like terms: 8x + 5x = 13x
-56 + 13x + 5x2 + -2x2 = 56 + -5x + 2x2 + -56 + 5x + -2x2

Combine like terms: 5x2 + -2x2 = 3x2
-56 + 13x + 3x2 = 56 + -5x + 2x2 + -56 + 5x + -2x2

Reorder the terms:
-56 + 13x + 3x2 = 56 + -56 + -5x + 5x + 2x2 + -2x2

Combine like terms: 56 + -56 = 0
-56 + 13x + 3x2 = 0 + -5x + 5x + 2x2 + -2x2
-56 + 13x + 3x2 = -5x + 5x + 2x2 + -2x2

Combine like terms: -5x + 5x = 0
-56 + 13x + 3x2 = 0 + 2x2 + -2x2
-56 + 13x + 3x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-56 + 13x + 3x2 = 0

Factor a trinomial.
(-7 + -1x)(8 + -3x) = 0

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(8 + -3x)' equal to zero and attempt to solve: Simplifying 8 + -3x = 0 Solving 8 + -3x = 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 + -3x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -3x = 0 + -8 -3x = 0 + -8 Combine like terms: 0 + -8 = -8 -3x = -8 Divide each side by '-3'. x = 2.666666667 Simplifying x = 2.666666667

Solution

x = {-7, 2.666666667}

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