(11x^2-4x+1)-(-x^2+5x-7)=0

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Solution for (11x^2-4x+1)-(-x^2+5x-7)=0 equation:


Simplifying
(11x2 + -4x + 1) + -1(-1x2 + 5x + -7) = 0

Reorder the terms:
(1 + -4x + 11x2) + -1(-1x2 + 5x + -7) = 0

Remove parenthesis around (1 + -4x + 11x2)
1 + -4x + 11x2 + -1(-1x2 + 5x + -7) = 0

Reorder the terms:
1 + -4x + 11x2 + -1(-7 + 5x + -1x2) = 0
1 + -4x + 11x2 + (-7 * -1 + 5x * -1 + -1x2 * -1) = 0
1 + -4x + 11x2 + (7 + -5x + 1x2) = 0

Reorder the terms:
1 + 7 + -4x + -5x + 11x2 + 1x2 = 0

Combine like terms: 1 + 7 = 8
8 + -4x + -5x + 11x2 + 1x2 = 0

Combine like terms: -4x + -5x = -9x
8 + -9x + 11x2 + 1x2 = 0

Combine like terms: 11x2 + 1x2 = 12x2
8 + -9x + 12x2 = 0

Solving
8 + -9x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
0.6666666667 + -0.75x + x2 = 0

Move the constant term to the right:

Add '-0.6666666667' to each side of the equation.
0.6666666667 + -0.75x + -0.6666666667 + x2 = 0 + -0.6666666667

Reorder the terms:
0.6666666667 + -0.6666666667 + -0.75x + x2 = 0 + -0.6666666667

Combine like terms: 0.6666666667 + -0.6666666667 = 0.0000000000
0.0000000000 + -0.75x + x2 = 0 + -0.6666666667
-0.75x + x2 = 0 + -0.6666666667

Combine like terms: 0 + -0.6666666667 = -0.6666666667
-0.75x + x2 = -0.6666666667

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = -0.6666666667 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = -0.6666666667 + 0.140625

Combine like terms: -0.6666666667 + 0.140625 = -0.5260416667
0.140625 + -0.75x + x2 = -0.5260416667

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = -0.5260416667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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