9x^2-6x+4-(8x^2-1x-12)=

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Solution for 9x^2-6x+4-(8x^2-1x-12)= equation:


Simplifying
9x2 + -6x + 4 + -1(8x2 + -1x + -12) = 0

Reorder the terms:
9x2 + -6x + 4 + -1(-12 + -1x + 8x2) = 0
9x2 + -6x + 4 + (-12 * -1 + -1x * -1 + 8x2 * -1) = 0
9x2 + -6x + 4 + (12 + 1x + -8x2) = 0

Reorder the terms:
4 + 12 + -6x + 1x + 9x2 + -8x2 = 0

Combine like terms: 4 + 12 = 16
16 + -6x + 1x + 9x2 + -8x2 = 0

Combine like terms: -6x + 1x = -5x
16 + -5x + 9x2 + -8x2 = 0

Combine like terms: 9x2 + -8x2 = 1x2
16 + -5x + 1x2 = 0

Solving
16 + -5x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + -5x + -16 + x2 = 0 + -16

Reorder the terms:
16 + -16 + -5x + x2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -5x + x2 = 0 + -16
-5x + x2 = 0 + -16

Combine like terms: 0 + -16 = -16
-5x + x2 = -16

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -16 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -16 + 6.25

Combine like terms: -16 + 6.25 = -9.75
6.25 + -5x + x2 = -9.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = -9.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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