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

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


Simplifying
(5x2 + -8x + -2) + (3x2 + 9x + 6) = 0

Reorder the terms:
(-2 + -8x + 5x2) + (3x2 + 9x + 6) = 0

Remove parenthesis around (-2 + -8x + 5x2)
-2 + -8x + 5x2 + (3x2 + 9x + 6) = 0

Reorder the terms:
-2 + -8x + 5x2 + (6 + 9x + 3x2) = 0

Remove parenthesis around (6 + 9x + 3x2)
-2 + -8x + 5x2 + 6 + 9x + 3x2 = 0

Reorder the terms:
-2 + 6 + -8x + 9x + 5x2 + 3x2 = 0

Combine like terms: -2 + 6 = 4
4 + -8x + 9x + 5x2 + 3x2 = 0

Combine like terms: -8x + 9x = 1x
4 + 1x + 5x2 + 3x2 = 0

Combine like terms: 5x2 + 3x2 = 8x2
4 + 1x + 8x2 = 0

Solving
4 + 1x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
0.5 + 0.125x + x2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + 0.125x + -0.5 + x2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + 0.125x + x2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + 0.125x + x2 = 0 + -0.5
0.125x + x2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
0.125x + x2 = -0.5

The x term is 0.125x.  Take half its coefficient (0.0625).
Square it (0.00390625) and add it to both sides.

Add '0.00390625' to each side of the equation.
0.125x + 0.00390625 + x2 = -0.5 + 0.00390625

Reorder the terms:
0.00390625 + 0.125x + x2 = -0.5 + 0.00390625

Combine like terms: -0.5 + 0.00390625 = -0.49609375
0.00390625 + 0.125x + x2 = -0.49609375

Factor a perfect square on the left side:
(x + 0.0625)(x + 0.0625) = -0.49609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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