(3u^2-5u+2)+(9u^2+5u-5)-(8u^2+3u-6)=

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Solution for (3u^2-5u+2)+(9u^2+5u-5)-(8u^2+3u-6)= equation:


Simplifying
(3u2 + -5u + 2) + (9u2 + 5u + -5) + -1(8u2 + 3u + -6) = 0

Reorder the terms:
(2 + -5u + 3u2) + (9u2 + 5u + -5) + -1(8u2 + 3u + -6) = 0

Remove parenthesis around (2 + -5u + 3u2)
2 + -5u + 3u2 + (9u2 + 5u + -5) + -1(8u2 + 3u + -6) = 0

Reorder the terms:
2 + -5u + 3u2 + (-5 + 5u + 9u2) + -1(8u2 + 3u + -6) = 0

Remove parenthesis around (-5 + 5u + 9u2)
2 + -5u + 3u2 + -5 + 5u + 9u2 + -1(8u2 + 3u + -6) = 0

Reorder the terms:
2 + -5u + 3u2 + -5 + 5u + 9u2 + -1(-6 + 3u + 8u2) = 0
2 + -5u + 3u2 + -5 + 5u + 9u2 + (-6 * -1 + 3u * -1 + 8u2 * -1) = 0
2 + -5u + 3u2 + -5 + 5u + 9u2 + (6 + -3u + -8u2) = 0

Reorder the terms:
2 + -5 + 6 + -5u + 5u + -3u + 3u2 + 9u2 + -8u2 = 0

Combine like terms: 2 + -5 = -3
-3 + 6 + -5u + 5u + -3u + 3u2 + 9u2 + -8u2 = 0

Combine like terms: -3 + 6 = 3
3 + -5u + 5u + -3u + 3u2 + 9u2 + -8u2 = 0

Combine like terms: -5u + 5u = 0
3 + 0 + -3u + 3u2 + 9u2 + -8u2 = 0
3 + -3u + 3u2 + 9u2 + -8u2 = 0

Combine like terms: 3u2 + 9u2 = 12u2
3 + -3u + 12u2 + -8u2 = 0

Combine like terms: 12u2 + -8u2 = 4u2
3 + -3u + 4u2 = 0

Solving
3 + -3u + 4u2 = 0

Solving for variable 'u'.

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

Divide each side by '4'.
0.75 + -0.75u + u2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -0.75u + -0.75 + u2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -0.75u + u2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -0.75u + u2 = 0 + -0.75
-0.75u + u2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-0.75u + u2 = -0.75

The u term is -0.75u.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75u + 0.140625 + u2 = -0.75 + 0.140625

Reorder the terms:
0.140625 + -0.75u + u2 = -0.75 + 0.140625

Combine like terms: -0.75 + 0.140625 = -0.609375
0.140625 + -0.75u + u2 = -0.609375

Factor a perfect square on the left side:
(u + -0.375)(u + -0.375) = -0.609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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