(7x^2-6x+3)-(2x^2-8)=

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Solution for (7x^2-6x+3)-(2x^2-8)= equation:


Simplifying
(7x2 + -6x + 3) + -1(2x2 + -8) = 0

Reorder the terms:
(3 + -6x + 7x2) + -1(2x2 + -8) = 0

Remove parenthesis around (3 + -6x + 7x2)
3 + -6x + 7x2 + -1(2x2 + -8) = 0

Reorder the terms:
3 + -6x + 7x2 + -1(-8 + 2x2) = 0
3 + -6x + 7x2 + (-8 * -1 + 2x2 * -1) = 0
3 + -6x + 7x2 + (8 + -2x2) = 0

Reorder the terms:
3 + 8 + -6x + 7x2 + -2x2 = 0

Combine like terms: 3 + 8 = 11
11 + -6x + 7x2 + -2x2 = 0

Combine like terms: 7x2 + -2x2 = 5x2
11 + -6x + 5x2 = 0

Solving
11 + -6x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
2.2 + -1.2x + x2 = 0

Move the constant term to the right:

Add '-2.2' to each side of the equation.
2.2 + -1.2x + -2.2 + x2 = 0 + -2.2

Reorder the terms:
2.2 + -2.2 + -1.2x + x2 = 0 + -2.2

Combine like terms: 2.2 + -2.2 = 0.0
0.0 + -1.2x + x2 = 0 + -2.2
-1.2x + x2 = 0 + -2.2

Combine like terms: 0 + -2.2 = -2.2
-1.2x + x2 = -2.2

The x term is -1.2x.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2x + 0.36 + x2 = -2.2 + 0.36

Reorder the terms:
0.36 + -1.2x + x2 = -2.2 + 0.36

Combine like terms: -2.2 + 0.36 = -1.84
0.36 + -1.2x + x2 = -1.84

Factor a perfect square on the left side:
(x + -0.6)(x + -0.6) = -1.84

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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