(3x^2+5x+5)+(5x^2+7x)=

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Solution for (3x^2+5x+5)+(5x^2+7x)= equation:


Simplifying
(3x2 + 5x + 5) + (5x2 + 7x) = 0

Reorder the terms:
(5 + 5x + 3x2) + (5x2 + 7x) = 0

Remove parenthesis around (5 + 5x + 3x2)
5 + 5x + 3x2 + (5x2 + 7x) = 0

Reorder the terms:
5 + 5x + 3x2 + (7x + 5x2) = 0

Remove parenthesis around (7x + 5x2)
5 + 5x + 3x2 + 7x + 5x2 = 0

Reorder the terms:
5 + 5x + 7x + 3x2 + 5x2 = 0

Combine like terms: 5x + 7x = 12x
5 + 12x + 3x2 + 5x2 = 0

Combine like terms: 3x2 + 5x2 = 8x2
5 + 12x + 8x2 = 0

Solving
5 + 12x + 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'.
0.625 + 1.5x + x2 = 0

Move the constant term to the right:

Add '-0.625' to each side of the equation.
0.625 + 1.5x + -0.625 + x2 = 0 + -0.625

Reorder the terms:
0.625 + -0.625 + 1.5x + x2 = 0 + -0.625

Combine like terms: 0.625 + -0.625 = 0.000
0.000 + 1.5x + x2 = 0 + -0.625
1.5x + x2 = 0 + -0.625

Combine like terms: 0 + -0.625 = -0.625
1.5x + x2 = -0.625

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = -0.625 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = -0.625 + 0.5625

Combine like terms: -0.625 + 0.5625 = -0.0625
0.5625 + 1.5x + x2 = -0.0625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = -0.0625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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