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

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


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

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

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

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

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

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

Combine like terms: 3x + -1x = 2x
-7 + 2x + -9x2 + -4x2 = 0

Combine like terms: -9x2 + -4x2 = -13x2
-7 + 2x + -13x2 = 0

Solving
-7 + 2x + -13x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-13 the coefficient of the squared term: 

Divide each side by '-13'.
0.5384615385 + -0.1538461538x + x2 = 0

Move the constant term to the right:

Add '-0.5384615385' to each side of the equation.
0.5384615385 + -0.1538461538x + -0.5384615385 + x2 = 0 + -0.5384615385

Reorder the terms:
0.5384615385 + -0.5384615385 + -0.1538461538x + x2 = 0 + -0.5384615385

Combine like terms: 0.5384615385 + -0.5384615385 = 0.0000000000
0.0000000000 + -0.1538461538x + x2 = 0 + -0.5384615385
-0.1538461538x + x2 = 0 + -0.5384615385

Combine like terms: 0 + -0.5384615385 = -0.5384615385
-0.1538461538x + x2 = -0.5384615385

The x term is -0.1538461538x.  Take half its coefficient (-0.0769230769).
Square it (0.005917159760) and add it to both sides.

Add '0.005917159760' to each side of the equation.
-0.1538461538x + 0.005917159760 + x2 = -0.5384615385 + 0.005917159760

Reorder the terms:
0.005917159760 + -0.1538461538x + x2 = -0.5384615385 + 0.005917159760

Combine like terms: -0.5384615385 + 0.005917159760 = -0.53254437874
0.005917159760 + -0.1538461538x + x2 = -0.53254437874

Factor a perfect square on the left side:
(x + -0.0769230769)(x + -0.0769230769) = -0.53254437874

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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