(3x^2-7x+12)+(2x^2-8)=

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Solution for (3x^2-7x+12)+(2x^2-8)= equation:


Simplifying
(3x2 + -7x + 12) + (2x2 + -8) = 0

Reorder the terms:
(12 + -7x + 3x2) + (2x2 + -8) = 0

Remove parenthesis around (12 + -7x + 3x2)
12 + -7x + 3x2 + (2x2 + -8) = 0

Reorder the terms:
12 + -7x + 3x2 + (-8 + 2x2) = 0

Remove parenthesis around (-8 + 2x2)
12 + -7x + 3x2 + -8 + 2x2 = 0

Reorder the terms:
12 + -8 + -7x + 3x2 + 2x2 = 0

Combine like terms: 12 + -8 = 4
4 + -7x + 3x2 + 2x2 = 0

Combine like terms: 3x2 + 2x2 = 5x2
4 + -7x + 5x2 = 0

Solving
4 + -7x + 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 + -1.4x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + -1.4x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + -1.4x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -1.4x + x2 = 0 + -0.8
-1.4x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
-1.4x + x2 = -0.8

The x term is -1.4x.  Take half its coefficient (-0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
-1.4x + 0.49 + x2 = -0.8 + 0.49

Reorder the terms:
0.49 + -1.4x + x2 = -0.8 + 0.49

Combine like terms: -0.8 + 0.49 = -0.31
0.49 + -1.4x + x2 = -0.31

Factor a perfect square on the left side:
(x + -0.7)(x + -0.7) = -0.31

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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