(5x^2-4x-1)-(-4x^2-4)=

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Solution for (5x^2-4x-1)-(-4x^2-4)= equation:


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

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

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

Reorder the terms:
-1 + -4x + 5x2 + -1(-4 + -4x2) = 0
-1 + -4x + 5x2 + (-4 * -1 + -4x2 * -1) = 0
-1 + -4x + 5x2 + (4 + 4x2) = 0

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

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

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

Solving
3 + -4x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
0.3333333333 + -0.4444444444x + x2 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + -0.4444444444x + -0.3333333333 + x2 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + -0.4444444444x + x2 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + -0.4444444444x + x2 = 0 + -0.3333333333
-0.4444444444x + x2 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
-0.4444444444x + x2 = -0.3333333333

The x term is -0.4444444444x.  Take half its coefficient (-0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
-0.4444444444x + 0.04938271604 + x2 = -0.3333333333 + 0.04938271604

Reorder the terms:
0.04938271604 + -0.4444444444x + x2 = -0.3333333333 + 0.04938271604

Combine like terms: -0.3333333333 + 0.04938271604 = -0.28395061726
0.04938271604 + -0.4444444444x + x2 = -0.28395061726

Factor a perfect square on the left side:
(x + -0.2222222222)(x + -0.2222222222) = -0.28395061726

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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