a(3a-4)-3a(a-7)=

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Solution for a(3a-4)-3a(a-7)= equation: 


Simplifying
a(3a + -4) + -3a(a + -7) = 0

Reorder the terms:
a(-4 + 3a) + -3a(a + -7) = 0
(-4 * a + 3a * a) + -3a(a + -7) = 0
(-4a + 3a2) + -3a(a + -7) = 0

Reorder the terms:
-4a + 3a2 + -3a(-7 + a) = 0
-4a + 3a2 + (-7 * -3a + a * -3a) = 0
-4a + 3a2 + (21a + -3a2) = 0

Reorder the terms:
-4a + 21a + 3a2 + -3a2 = 0

Combine like terms: -4a + 21a = 17a
17a + 3a2 + -3a2 = 0

Combine like terms: 3a2 + -3a2 = 0
17a + 0 = 0
17a = 0

Solving
17a = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Divide each side by '17'.
a = 0

Simplifying
a = 0

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