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

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


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

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

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

Multiply (1 + -2x) * (-7 + -2x)
(1(-7 + -2x) + -2x * (-7 + -2x)) = 0
((-7 * 1 + -2x * 1) + -2x * (-7 + -2x)) = 0
((-7 + -2x) + -2x * (-7 + -2x)) = 0
(-7 + -2x + (-7 * -2x + -2x * -2x)) = 0
(-7 + -2x + (14x + 4x2)) = 0

Combine like terms: -2x + 14x = 12x
(-7 + 12x + 4x2) = 0

Solving
-7 + 12x + 4x2 = 0

Solving for variable 'x'.

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


Subproblem 1
Set the factor '(-7 + -2x)' equal to zero and attempt to solve:

Simplifying
-7 + -2x = 0

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

Combine like terms: -7 + 7 = 0
0 + -2x = 0 + 7
-2x = 0 + 7

Combine like terms: 0 + 7 = 7
-2x = 7

Divide each side by '-2'.
x = -3.5

Simplifying
x = -3.5

Subproblem 2
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
Solution
x = {-3.5, 0.5}

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