(3x^2-5x+7)+(4x^2+9x-1)=

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Solution for (3x^2-5x+7)+(4x^2+9x-1)= equation:


Simplifying
(3x2 + -5x + 7) + (4x2 + 9x + -1) = 0

Reorder the terms:
(7 + -5x + 3x2) + (4x2 + 9x + -1) = 0

Remove parenthesis around (7 + -5x + 3x2)
7 + -5x + 3x2 + (4x2 + 9x + -1) = 0

Reorder the terms:
7 + -5x + 3x2 + (-1 + 9x + 4x2) = 0

Remove parenthesis around (-1 + 9x + 4x2)
7 + -5x + 3x2 + -1 + 9x + 4x2 = 0

Reorder the terms:
7 + -1 + -5x + 9x + 3x2 + 4x2 = 0

Combine like terms: 7 + -1 = 6
6 + -5x + 9x + 3x2 + 4x2 = 0

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

Combine like terms: 3x2 + 4x2 = 7x2
6 + 4x + 7x2 = 0

Solving
6 + 4x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
0.8571428571 + 0.5714285714x + x2 = 0

Move the constant term to the right:

Add '-0.8571428571' to each side of the equation.
0.8571428571 + 0.5714285714x + -0.8571428571 + x2 = 0 + -0.8571428571

Reorder the terms:
0.8571428571 + -0.8571428571 + 0.5714285714x + x2 = 0 + -0.8571428571

Combine like terms: 0.8571428571 + -0.8571428571 = 0.0000000000
0.0000000000 + 0.5714285714x + x2 = 0 + -0.8571428571
0.5714285714x + x2 = 0 + -0.8571428571

Combine like terms: 0 + -0.8571428571 = -0.8571428571
0.5714285714x + x2 = -0.8571428571

The x term is 0.5714285714x.  Take half its coefficient (0.2857142857).
Square it (0.08163265305) and add it to both sides.

Add '0.08163265305' to each side of the equation.
0.5714285714x + 0.08163265305 + x2 = -0.8571428571 + 0.08163265305

Reorder the terms:
0.08163265305 + 0.5714285714x + x2 = -0.8571428571 + 0.08163265305

Combine like terms: -0.8571428571 + 0.08163265305 = -0.77551020405
0.08163265305 + 0.5714285714x + x2 = -0.77551020405

Factor a perfect square on the left side:
(x + 0.2857142857)(x + 0.2857142857) = -0.77551020405

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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