(7a^3-2a^2-4a+9)+(3a+6)-(-a^2-a+3)=

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Solution for (7a^3-2a^2-4a+9)+(3a+6)-(-a^2-a+3)= equation:


Simplifying
(7a3 + -2a2 + -4a + 9) + (3a + 6) + -1(-1a2 + -1a + 3) = 0

Reorder the terms:
(9 + -4a + -2a2 + 7a3) + (3a + 6) + -1(-1a2 + -1a + 3) = 0

Remove parenthesis around (9 + -4a + -2a2 + 7a3)
9 + -4a + -2a2 + 7a3 + (3a + 6) + -1(-1a2 + -1a + 3) = 0

Reorder the terms:
9 + -4a + -2a2 + 7a3 + (6 + 3a) + -1(-1a2 + -1a + 3) = 0

Remove parenthesis around (6 + 3a)
9 + -4a + -2a2 + 7a3 + 6 + 3a + -1(-1a2 + -1a + 3) = 0

Reorder the terms:
9 + -4a + -2a2 + 7a3 + 6 + 3a + -1(3 + -1a + -1a2) = 0
9 + -4a + -2a2 + 7a3 + 6 + 3a + (3 * -1 + -1a * -1 + -1a2 * -1) = 0
9 + -4a + -2a2 + 7a3 + 6 + 3a + (-3 + 1a + 1a2) = 0

Reorder the terms:
9 + 6 + -3 + -4a + 3a + 1a + -2a2 + 1a2 + 7a3 = 0

Combine like terms: 9 + 6 = 15
15 + -3 + -4a + 3a + 1a + -2a2 + 1a2 + 7a3 = 0

Combine like terms: 15 + -3 = 12
12 + -4a + 3a + 1a + -2a2 + 1a2 + 7a3 = 0

Combine like terms: -4a + 3a = -1a
12 + -1a + 1a + -2a2 + 1a2 + 7a3 = 0

Combine like terms: -1a + 1a = 0
12 + 0 + -2a2 + 1a2 + 7a3 = 0
12 + -2a2 + 1a2 + 7a3 = 0

Combine like terms: -2a2 + 1a2 = -1a2
12 + -1a2 + 7a3 = 0

Solving
12 + -1a2 + 7a3 = 0

Solving for variable 'a'.

The solution to this equation could not be determined.

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