x(5x+12)=2x^2-8x+7

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Solution for x(5x+12)=2x^2-8x+7 equation:


Simplifying
x(5x + 12) = 2x2 + -8x + 7

Reorder the terms:
x(12 + 5x) = 2x2 + -8x + 7
(12 * x + 5x * x) = 2x2 + -8x + 7
(12x + 5x2) = 2x2 + -8x + 7

Reorder the terms:
12x + 5x2 = 7 + -8x + 2x2

Solving
12x + 5x2 = 7 + -8x + 2x2

Solving for variable 'x'.

Reorder the terms:
-7 + 12x + 8x + 5x2 + -2x2 = 7 + -8x + 2x2 + -7 + 8x + -2x2

Combine like terms: 12x + 8x = 20x
-7 + 20x + 5x2 + -2x2 = 7 + -8x + 2x2 + -7 + 8x + -2x2

Combine like terms: 5x2 + -2x2 = 3x2
-7 + 20x + 3x2 = 7 + -8x + 2x2 + -7 + 8x + -2x2

Reorder the terms:
-7 + 20x + 3x2 = 7 + -7 + -8x + 8x + 2x2 + -2x2

Combine like terms: 7 + -7 = 0
-7 + 20x + 3x2 = 0 + -8x + 8x + 2x2 + -2x2
-7 + 20x + 3x2 = -8x + 8x + 2x2 + -2x2

Combine like terms: -8x + 8x = 0
-7 + 20x + 3x2 = 0 + 2x2 + -2x2
-7 + 20x + 3x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-7 + 20x + 3x2 = 0

Factor a trinomial.
(-7 + -1x)(1 + -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 '(1 + -3x)' equal to zero and attempt to solve: Simplifying 1 + -3x = 0 Solving 1 + -3x = 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 + -3x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3x = 0 + -1 -3x = 0 + -1 Combine like terms: 0 + -1 = -1 -3x = -1 Divide each side by '-3'. x = 0.3333333333 Simplifying x = 0.3333333333

Solution

x = {-7, 0.3333333333}

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