x(5x+7)=2x^2-12x+72

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Solution for x(5x+7)=2x^2-12x+72 equation:


Simplifying
x(5x + 7) = 2x2 + -12x + 72

Reorder the terms:
x(7 + 5x) = 2x2 + -12x + 72
(7 * x + 5x * x) = 2x2 + -12x + 72
(7x + 5x2) = 2x2 + -12x + 72

Reorder the terms:
7x + 5x2 = 72 + -12x + 2x2

Solving
7x + 5x2 = 72 + -12x + 2x2

Solving for variable 'x'.

Reorder the terms:
-72 + 7x + 12x + 5x2 + -2x2 = 72 + -12x + 2x2 + -72 + 12x + -2x2

Combine like terms: 7x + 12x = 19x
-72 + 19x + 5x2 + -2x2 = 72 + -12x + 2x2 + -72 + 12x + -2x2

Combine like terms: 5x2 + -2x2 = 3x2
-72 + 19x + 3x2 = 72 + -12x + 2x2 + -72 + 12x + -2x2

Reorder the terms:
-72 + 19x + 3x2 = 72 + -72 + -12x + 12x + 2x2 + -2x2

Combine like terms: 72 + -72 = 0
-72 + 19x + 3x2 = 0 + -12x + 12x + 2x2 + -2x2
-72 + 19x + 3x2 = -12x + 12x + 2x2 + -2x2

Combine like terms: -12x + 12x = 0
-72 + 19x + 3x2 = 0 + 2x2 + -2x2
-72 + 19x + 3x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-72 + 19x + 3x2 = 0

Factor a trinomial.
(-9 + -1x)(8 + -3x) = 0

Subproblem 1

Set the factor '(-9 + -1x)' equal to zero and attempt to solve: Simplifying -9 + -1x = 0 Solving -9 + -1x = 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 + -1x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1x = 0 + 9 -1x = 0 + 9 Combine like terms: 0 + 9 = 9 -1x = 9 Divide each side by '-1'. x = -9 Simplifying x = -9

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 = {-9, 2.666666667}

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