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Simplifying
(3a)(-7)(-8a) = 0
Remove parenthesis around (3a)
3a(-7)(-8a) = 0
Remove parenthesis around (-8a)
3a * -7 * -8a = 0
Reorder the terms for easier multiplication:
3 * -7 * -8a * a = 0
Multiply 3 * -7
-21 * -8a * a = 0
Multiply -21 * -8
168a * a = 0
Multiply a * a
168a2 = 0
Solving
168a2 = 0
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Divide each side by '168'.
a2 = 0
Simplifying
a2 = 0
Take the square root of each side:
a = {0}
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