=-3x^2+7x-8

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


Simplifying
0 = -3x2 + 7x + -8

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

Solving
0 = -8 + 7x + -3x2

Solving for variable 'x'.

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

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

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

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

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

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

Divide each side by '3'.
2.666666667 + -2.333333333x + x2 = 0

Move the constant term to the right:

Add '-2.666666667' to each side of the equation.
2.666666667 + -2.333333333x + -2.666666667 + x2 = 0 + -2.666666667

Reorder the terms:
2.666666667 + -2.666666667 + -2.333333333x + x2 = 0 + -2.666666667

Combine like terms: 2.666666667 + -2.666666667 = 0.000000000
0.000000000 + -2.333333333x + x2 = 0 + -2.666666667
-2.333333333x + x2 = 0 + -2.666666667

Combine like terms: 0 + -2.666666667 = -2.666666667
-2.333333333x + x2 = -2.666666667

The x term is -2.333333333x.  Take half its coefficient (-1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
-2.333333333x + 1.361111112 + x2 = -2.666666667 + 1.361111112

Reorder the terms:
1.361111112 + -2.333333333x + x2 = -2.666666667 + 1.361111112

Combine like terms: -2.666666667 + 1.361111112 = -1.305555555
1.361111112 + -2.333333333x + x2 = -1.305555555

Factor a perfect square on the left side:
(x + -1.166666667)(x + -1.166666667) = -1.305555555

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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