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Simplifying
(2x + 4)(x + -2) = 0
Reorder the terms:
(4 + 2x)(x + -2) = 0
Reorder the terms:
(4 + 2x)(-2 + x) = 0
Multiply (4 + 2x) * (-2 + x)
(4(-2 + x) + 2x * (-2 + x)) = 0
((-2 * 4 + x * 4) + 2x * (-2 + x)) = 0
((-8 + 4x) + 2x * (-2 + x)) = 0
(-8 + 4x + (-2 * 2x + x * 2x)) = 0
(-8 + 4x + (-4x + 2x2)) = 0
Combine like terms: 4x + -4x = 0
(-8 + 0 + 2x2) = 0
(-8 + 2x2) = 0
Solving
-8 + 2x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 2x2 = 0 + 8
Combine like terms: -8 + 8 = 0
0 + 2x2 = 0 + 8
2x2 = 0 + 8
Combine like terms: 0 + 8 = 8
2x2 = 8
Divide each side by '2'.
x2 = 4
Simplifying
x2 = 4
Take the square root of each side:
x = {-2, 2}
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