3a^2+6-2a^2+9+5a=

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Solution for 3a^2+6-2a^2+9+5a= equation:


Simplifying
3a2 + 6 + -2a2 + 9 + 5a = 0

Reorder the terms:
6 + 9 + 5a + 3a2 + -2a2 = 0

Combine like terms: 6 + 9 = 15
15 + 5a + 3a2 + -2a2 = 0

Combine like terms: 3a2 + -2a2 = 1a2
15 + 5a + 1a2 = 0

Solving
15 + 5a + 1a2 = 0

Solving for variable 'a'.

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + 5a + -15 + a2 = 0 + -15

Reorder the terms:
15 + -15 + 5a + a2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 5a + a2 = 0 + -15
5a + a2 = 0 + -15

Combine like terms: 0 + -15 = -15
5a + a2 = -15

The a term is 5a.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5a + 6.25 + a2 = -15 + 6.25

Reorder the terms:
6.25 + 5a + a2 = -15 + 6.25

Combine like terms: -15 + 6.25 = -8.75
6.25 + 5a + a2 = -8.75

Factor a perfect square on the left side:
(a + 2.5)(a + 2.5) = -8.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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