7x^2-40x+15=-2x

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Solution for 7x^2-40x+15=-2x equation:


Simplifying
7x2 + -40x + 15 = -2x

Reorder the terms:
15 + -40x + 7x2 = -2x

Solving
15 + -40x + 7x2 = -2x

Solving for variable 'x'.

Reorder the terms:
15 + -40x + 2x + 7x2 = -2x + 2x

Combine like terms: -40x + 2x = -38x
15 + -38x + 7x2 = -2x + 2x

Combine like terms: -2x + 2x = 0
15 + -38x + 7x2 = 0

Factor a trinomial.
(3 + -7x)(5 + -1x) = 0

Subproblem 1

Set the factor '(3 + -7x)' equal to zero and attempt to solve: Simplifying 3 + -7x = 0 Solving 3 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -7x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -7x = 0 + -3 -7x = 0 + -3 Combine like terms: 0 + -3 = -3 -7x = -3 Divide each side by '-7'. x = 0.4285714286 Simplifying x = 0.4285714286

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {0.4285714286, 5}

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