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Simplifying
(-7x)(-4x) = 0
Remove parenthesis around (-7x)
-7x(-4x) = 0
Remove parenthesis around (-4x)
-7x * -4x = 0
Reorder the terms for easier multiplication:
-7 * -4x * x = 0
Multiply -7 * -4
28x * x = 0
Multiply x * x
28x2 = 0
Solving
28x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '28'.
x2 = 0
Simplifying
x2 = 0
Take the square root of each side:
x = {0}
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