(17-9x+4x^2)-(7x-4x^2-28)=

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Solution for (17-9x+4x^2)-(7x-4x^2-28)= equation:


Simplifying
(17 + -9x + 4x2) + -1(7x + -4x2 + -28) = 0

Remove parenthesis around (17 + -9x + 4x2)
17 + -9x + 4x2 + -1(7x + -4x2 + -28) = 0

Reorder the terms:
17 + -9x + 4x2 + -1(-28 + 7x + -4x2) = 0
17 + -9x + 4x2 + (-28 * -1 + 7x * -1 + -4x2 * -1) = 0
17 + -9x + 4x2 + (28 + -7x + 4x2) = 0

Reorder the terms:
17 + 28 + -9x + -7x + 4x2 + 4x2 = 0

Combine like terms: 17 + 28 = 45
45 + -9x + -7x + 4x2 + 4x2 = 0

Combine like terms: -9x + -7x = -16x
45 + -16x + 4x2 + 4x2 = 0

Combine like terms: 4x2 + 4x2 = 8x2
45 + -16x + 8x2 = 0

Solving
45 + -16x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
5.625 + -2x + x2 = 0

Move the constant term to the right:

Add '-5.625' to each side of the equation.
5.625 + -2x + -5.625 + x2 = 0 + -5.625

Reorder the terms:
5.625 + -5.625 + -2x + x2 = 0 + -5.625

Combine like terms: 5.625 + -5.625 = 0.000
0.000 + -2x + x2 = 0 + -5.625
-2x + x2 = 0 + -5.625

Combine like terms: 0 + -5.625 = -5.625
-2x + x2 = -5.625

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = -5.625 + 1

Reorder the terms:
1 + -2x + x2 = -5.625 + 1

Combine like terms: -5.625 + 1 = -4.625
1 + -2x + x2 = -4.625

Factor a perfect square on the left side:
(x + -1)(x + -1) = -4.625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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