x(5x+2)=2x^2-9x+42

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Solution for x(5x+2)=2x^2-9x+42 equation:


Simplifying
x(5x + 2) = 2x2 + -9x + 42

Reorder the terms:
x(2 + 5x) = 2x2 + -9x + 42
(2 * x + 5x * x) = 2x2 + -9x + 42
(2x + 5x2) = 2x2 + -9x + 42

Reorder the terms:
2x + 5x2 = 42 + -9x + 2x2

Solving
2x + 5x2 = 42 + -9x + 2x2

Solving for variable 'x'.

Reorder the terms:
-42 + 2x + 9x + 5x2 + -2x2 = 42 + -9x + 2x2 + -42 + 9x + -2x2

Combine like terms: 2x + 9x = 11x
-42 + 11x + 5x2 + -2x2 = 42 + -9x + 2x2 + -42 + 9x + -2x2

Combine like terms: 5x2 + -2x2 = 3x2
-42 + 11x + 3x2 = 42 + -9x + 2x2 + -42 + 9x + -2x2

Reorder the terms:
-42 + 11x + 3x2 = 42 + -42 + -9x + 9x + 2x2 + -2x2

Combine like terms: 42 + -42 = 0
-42 + 11x + 3x2 = 0 + -9x + 9x + 2x2 + -2x2
-42 + 11x + 3x2 = -9x + 9x + 2x2 + -2x2

Combine like terms: -9x + 9x = 0
-42 + 11x + 3x2 = 0 + 2x2 + -2x2
-42 + 11x + 3x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-42 + 11x + 3x2 = 0

Factor a trinomial.
(-6 + -1x)(7 + -3x) = 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 '(7 + -3x)' equal to zero and attempt to solve: Simplifying 7 + -3x = 0 Solving 7 + -3x = 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 + -3x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -3x = 0 + -7 -3x = 0 + -7 Combine like terms: 0 + -7 = -7 -3x = -7 Divide each side by '-3'. x = 2.333333333 Simplifying x = 2.333333333

Solution

x = {-6, 2.333333333}

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