(x^2+2x+1)+(4x^2+5x+3)=0

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Solution for (x^2+2x+1)+(4x^2+5x+3)=0 equation:


Simplifying
(x2 + 2x + 1) + (4x2 + 5x + 3) = 0

Reorder the terms:
(1 + 2x + x2) + (4x2 + 5x + 3) = 0

Remove parenthesis around (1 + 2x + x2)
1 + 2x + x2 + (4x2 + 5x + 3) = 0

Reorder the terms:
1 + 2x + x2 + (3 + 5x + 4x2) = 0

Remove parenthesis around (3 + 5x + 4x2)
1 + 2x + x2 + 3 + 5x + 4x2 = 0

Reorder the terms:
1 + 3 + 2x + 5x + x2 + 4x2 = 0

Combine like terms: 1 + 3 = 4
4 + 2x + 5x + x2 + 4x2 = 0

Combine like terms: 2x + 5x = 7x
4 + 7x + x2 + 4x2 = 0

Combine like terms: x2 + 4x2 = 5x2
4 + 7x + 5x2 = 0

Solving
4 + 7x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
0.8 + 1.4x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + 1.4x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + 1.4x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 1.4x + x2 = 0 + -0.8
1.4x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
1.4x + x2 = -0.8

The x term is 1.4x.  Take half its coefficient (0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
1.4x + 0.49 + x2 = -0.8 + 0.49

Reorder the terms:
0.49 + 1.4x + x2 = -0.8 + 0.49

Combine like terms: -0.8 + 0.49 = -0.31
0.49 + 1.4x + x2 = -0.31

Factor a perfect square on the left side:
(x + 0.7)(x + 0.7) = -0.31

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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