(7x^2-2x+1)+(-3x^2+4x+6)=

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Solution for (7x^2-2x+1)+(-3x^2+4x+6)= equation:


Simplifying
(7x2 + -2x + 1) + (-3x2 + 4x + 6) = 0

Reorder the terms:
(1 + -2x + 7x2) + (-3x2 + 4x + 6) = 0

Remove parenthesis around (1 + -2x + 7x2)
1 + -2x + 7x2 + (-3x2 + 4x + 6) = 0

Reorder the terms:
1 + -2x + 7x2 + (6 + 4x + -3x2) = 0

Remove parenthesis around (6 + 4x + -3x2)
1 + -2x + 7x2 + 6 + 4x + -3x2 = 0

Reorder the terms:
1 + 6 + -2x + 4x + 7x2 + -3x2 = 0

Combine like terms: 1 + 6 = 7
7 + -2x + 4x + 7x2 + -3x2 = 0

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

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

Solving
7 + 2x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
1.75 + 0.5x + x2 = 0

Move the constant term to the right:

Add '-1.75' to each side of the equation.
1.75 + 0.5x + -1.75 + x2 = 0 + -1.75

Reorder the terms:
1.75 + -1.75 + 0.5x + x2 = 0 + -1.75

Combine like terms: 1.75 + -1.75 = 0.00
0.00 + 0.5x + x2 = 0 + -1.75
0.5x + x2 = 0 + -1.75

Combine like terms: 0 + -1.75 = -1.75
0.5x + x2 = -1.75

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = -1.75 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = -1.75 + 0.0625

Combine like terms: -1.75 + 0.0625 = -1.6875
0.0625 + 0.5x + x2 = -1.6875

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = -1.6875

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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