-(x+7)(2x-1)=0

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Solution for -(x+7)(2x-1)=0 equation:


Simplifying
-1(x + 7)(2x + -1) = 0

Reorder the terms:
-1(7 + x)(2x + -1) = 0

Reorder the terms:
-1(7 + x)(-1 + 2x) = 0

Multiply (7 + x) * (-1 + 2x)
-1(7(-1 + 2x) + x(-1 + 2x)) = 0
-1((-1 * 7 + 2x * 7) + x(-1 + 2x)) = 0
-1((-7 + 14x) + x(-1 + 2x)) = 0
-1(-7 + 14x + (-1 * x + 2x * x)) = 0
-1(-7 + 14x + (-1x + 2x2)) = 0

Combine like terms: 14x + -1x = 13x
-1(-7 + 13x + 2x2) = 0
(-7 * -1 + 13x * -1 + 2x2 * -1) = 0
(7 + -13x + -2x2) = 0

Solving
7 + -13x + -2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(1 + -2x)(7 + x) = 0

Subproblem 1

Set the factor '(1 + -2x)' equal to zero and attempt to solve: Simplifying 1 + -2x = 0 Solving 1 + -2x = 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 + -2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2x = 0 + -1 -2x = 0 + -1 Combine like terms: 0 + -1 = -1 -2x = -1 Divide each side by '-2'. x = 0.5 Simplifying x = 0.5

Subproblem 2

Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 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 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7

Solution

x = {0.5, -7}

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