7a^2-5a+3a^2+2a-3+9a+4=

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Solution for 7a^2-5a+3a^2+2a-3+9a+4= equation:


Simplifying
7a2 + -5a + 3a2 + 2a + -3 + 9a + 4 = 0

Reorder the terms:
-3 + 4 + -5a + 2a + 9a + 7a2 + 3a2 = 0

Combine like terms: -3 + 4 = 1
1 + -5a + 2a + 9a + 7a2 + 3a2 = 0

Combine like terms: -5a + 2a = -3a
1 + -3a + 9a + 7a2 + 3a2 = 0

Combine like terms: -3a + 9a = 6a
1 + 6a + 7a2 + 3a2 = 0

Combine like terms: 7a2 + 3a2 = 10a2
1 + 6a + 10a2 = 0

Solving
1 + 6a + 10a2 = 0

Solving for variable 'a'.

Begin completing the square.  Divide all terms by
10 the coefficient of the squared term: 

Divide each side by '10'.
0.1 + 0.6a + a2 = 0.0

Move the constant term to the right:

Add '-0.1' to each side of the equation.
0.1 + 0.6a + -0.1 + a2 = 0.0 + -0.1

Reorder the terms:
0.1 + -0.1 + 0.6a + a2 = 0.0 + -0.1

Combine like terms: 0.1 + -0.1 = 0.0
0.0 + 0.6a + a2 = 0.0 + -0.1
0.6a + a2 = 0.0 + -0.1

Combine like terms: 0.0 + -0.1 = -0.1
0.6a + a2 = -0.1

The a term is 0.6a.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6a + 0.09 + a2 = -0.1 + 0.09

Reorder the terms:
0.09 + 0.6a + a2 = -0.1 + 0.09

Combine like terms: -0.1 + 0.09 = -0.01
0.09 + 0.6a + a2 = -0.01

Factor a perfect square on the left side:
(a + 0.3)(a + 0.3) = -0.01

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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