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Simplifying
-4a(3a + -5a) = 0
Combine like terms: 3a + -5a = -2a
-4a(-2a) = 0
Remove parenthesis around (-2a)
-4a * -2a = 0
Reorder the terms for easier multiplication:
-4 * -2a * a = 0
Multiply -4 * -2
8a * a = 0
Multiply a * a
8a2 = 0
Solving
8a2 = 0
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Divide each side by '8'.
a2 = 0
Simplifying
a2 = 0
Take the square root of each side:
a = {0}
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