(9x^2-2x+7)+(8x^2-5x+3)-(3x^2+9)=

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Solution for (9x^2-2x+7)+(8x^2-5x+3)-(3x^2+9)= equation: 


Simplifying
(9x2 + -2x + 7) + (8x2 + -5x + 3) + -1(3x2 + 9) = 0

Reorder the terms:
(7 + -2x + 9x2) + (8x2 + -5x + 3) + -1(3x2 + 9) = 0

Remove parenthesis around (7 + -2x + 9x2)
7 + -2x + 9x2 + (8x2 + -5x + 3) + -1(3x2 + 9) = 0

Reorder the terms:
7 + -2x + 9x2 + (3 + -5x + 8x2) + -1(3x2 + 9) = 0

Remove parenthesis around (3 + -5x + 8x2)
7 + -2x + 9x2 + 3 + -5x + 8x2 + -1(3x2 + 9) = 0

Reorder the terms:
7 + -2x + 9x2 + 3 + -5x + 8x2 + -1(9 + 3x2) = 0
7 + -2x + 9x2 + 3 + -5x + 8x2 + (9 * -1 + 3x2 * -1) = 0
7 + -2x + 9x2 + 3 + -5x + 8x2 + (-9 + -3x2) = 0

Reorder the terms:
7 + 3 + -9 + -2x + -5x + 9x2 + 8x2 + -3x2 = 0

Combine like terms: 7 + 3 = 10
10 + -9 + -2x + -5x + 9x2 + 8x2 + -3x2 = 0

Combine like terms: 10 + -9 = 1
1 + -2x + -5x + 9x2 + 8x2 + -3x2 = 0

Combine like terms: -2x + -5x = -7x
1 + -7x + 9x2 + 8x2 + -3x2 = 0

Combine like terms: 9x2 + 8x2 = 17x2
1 + -7x + 17x2 + -3x2 = 0

Combine like terms: 17x2 + -3x2 = 14x2
1 + -7x + 14x2 = 0

Solving
1 + -7x + 14x2 = 0

Solving for variable 'x'.

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

Divide each side by '14'.
0.07142857143 + -0.5x + x2 = 0

Move the constant term to the right:

Add '-0.07142857143' to each side of the equation.
0.07142857143 + -0.5x + -0.07142857143 + x2 = 0 + -0.07142857143

Reorder the terms:
0.07142857143 + -0.07142857143 + -0.5x + x2 = 0 + -0.07142857143

Combine like terms: 0.07142857143 + -0.07142857143 = 0.00000000000
0.00000000000 + -0.5x + x2 = 0 + -0.07142857143
-0.5x + x2 = 0 + -0.07142857143

Combine like terms: 0 + -0.07142857143 = -0.07142857143
-0.5x + x2 = -0.07142857143

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 = -0.07142857143 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = -0.07142857143 + 0.0625

Combine like terms: -0.07142857143 + 0.0625 = -0.00892857143
0.0625 + -0.5x + x2 = -0.00892857143

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = -0.00892857143

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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