(12x^2-5x+9)-(7x^2-11x+5)=

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Solution for (12x^2-5x+9)-(7x^2-11x+5)= equation:


Simplifying
(12x2 + -5x + 9) + -1(7x2 + -11x + 5) = 0

Reorder the terms:
(9 + -5x + 12x2) + -1(7x2 + -11x + 5) = 0

Remove parenthesis around (9 + -5x + 12x2)
9 + -5x + 12x2 + -1(7x2 + -11x + 5) = 0

Reorder the terms:
9 + -5x + 12x2 + -1(5 + -11x + 7x2) = 0
9 + -5x + 12x2 + (5 * -1 + -11x * -1 + 7x2 * -1) = 0
9 + -5x + 12x2 + (-5 + 11x + -7x2) = 0

Reorder the terms:
9 + -5 + -5x + 11x + 12x2 + -7x2 = 0

Combine like terms: 9 + -5 = 4
4 + -5x + 11x + 12x2 + -7x2 = 0

Combine like terms: -5x + 11x = 6x
4 + 6x + 12x2 + -7x2 = 0

Combine like terms: 12x2 + -7x2 = 5x2
4 + 6x + 5x2 = 0

Solving
4 + 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'.
0.8 + 1.2x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + 1.2x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + 1.2x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 1.2x + x2 = 0 + -0.8
1.2x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
1.2x + x2 = -0.8

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 = -0.8 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = -0.8 + 0.36

Combine like terms: -0.8 + 0.36 = -0.44
0.36 + 1.2x + x2 = -0.44

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = -0.44

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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