(9a^2+2a-7)-(-2a^2+6a-10)=0

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Solution for (9a^2+2a-7)-(-2a^2+6a-10)=0 equation:


Simplifying
(9a2 + 2a + -7) + -1(-2a2 + 6a + -10) = 0

Reorder the terms:
(-7 + 2a + 9a2) + -1(-2a2 + 6a + -10) = 0

Remove parenthesis around (-7 + 2a + 9a2)
-7 + 2a + 9a2 + -1(-2a2 + 6a + -10) = 0

Reorder the terms:
-7 + 2a + 9a2 + -1(-10 + 6a + -2a2) = 0
-7 + 2a + 9a2 + (-10 * -1 + 6a * -1 + -2a2 * -1) = 0
-7 + 2a + 9a2 + (10 + -6a + 2a2) = 0

Reorder the terms:
-7 + 10 + 2a + -6a + 9a2 + 2a2 = 0

Combine like terms: -7 + 10 = 3
3 + 2a + -6a + 9a2 + 2a2 = 0

Combine like terms: 2a + -6a = -4a
3 + -4a + 9a2 + 2a2 = 0

Combine like terms: 9a2 + 2a2 = 11a2
3 + -4a + 11a2 = 0

Solving
3 + -4a + 11a2 = 0

Solving for variable 'a'.

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

Divide each side by '11'.
0.2727272727 + -0.3636363636a + a2 = 0

Move the constant term to the right:

Add '-0.2727272727' to each side of the equation.
0.2727272727 + -0.3636363636a + -0.2727272727 + a2 = 0 + -0.2727272727

Reorder the terms:
0.2727272727 + -0.2727272727 + -0.3636363636a + a2 = 0 + -0.2727272727

Combine like terms: 0.2727272727 + -0.2727272727 = 0.0000000000
0.0000000000 + -0.3636363636a + a2 = 0 + -0.2727272727
-0.3636363636a + a2 = 0 + -0.2727272727

Combine like terms: 0 + -0.2727272727 = -0.2727272727
-0.3636363636a + a2 = -0.2727272727

The a term is -0.3636363636a.  Take half its coefficient (-0.1818181818).
Square it (0.03305785123) and add it to both sides.

Add '0.03305785123' to each side of the equation.
-0.3636363636a + 0.03305785123 + a2 = -0.2727272727 + 0.03305785123

Reorder the terms:
0.03305785123 + -0.3636363636a + a2 = -0.2727272727 + 0.03305785123

Combine like terms: -0.2727272727 + 0.03305785123 = -0.23966942147
0.03305785123 + -0.3636363636a + a2 = -0.23966942147

Factor a perfect square on the left side:
(a + -0.1818181818)(a + -0.1818181818) = -0.23966942147

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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