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Simplifying
(5x)(-8x) = 0
Remove parenthesis around (5x)
5x(-8x) = 0
Remove parenthesis around (-8x)
5x * -8x = 0
Reorder the terms for easier multiplication:
5 * -8x * x = 0
Multiply 5 * -8
-40x * x = 0
Multiply x * x
-40x2 = 0
Solving
-40x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '-40'.
x2 = 0.0
Simplifying
x2 = 0.0
Take the square root of each side:
x = {0.0}
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