-5x+7=-8x^2

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Solution for -5x+7=-8x^2 equation:


Simplifying
-5x + 7 = -8x2

Reorder the terms:
7 + -5x = -8x2

Solving
7 + -5x = -8x2

Solving for variable 'x'.

Combine like terms: -8x2 + 8x2 = 0
7 + -5x + 8x2 = 0

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

Divide each side by '8'.
0.875 + -0.625x + x2 = 0

Move the constant term to the right:

Add '-0.875' to each side of the equation.
0.875 + -0.625x + -0.875 + x2 = 0 + -0.875

Reorder the terms:
0.875 + -0.875 + -0.625x + x2 = 0 + -0.875

Combine like terms: 0.875 + -0.875 = 0.000
0.000 + -0.625x + x2 = 0 + -0.875
-0.625x + x2 = 0 + -0.875

Combine like terms: 0 + -0.875 = -0.875
-0.625x + x2 = -0.875

The x term is -0.625x.  Take half its coefficient (-0.3125).
Square it (0.09765625) and add it to both sides.

Add '0.09765625' to each side of the equation.
-0.625x + 0.09765625 + x2 = -0.875 + 0.09765625

Reorder the terms:
0.09765625 + -0.625x + x2 = -0.875 + 0.09765625

Combine like terms: -0.875 + 0.09765625 = -0.77734375
0.09765625 + -0.625x + x2 = -0.77734375

Factor a perfect square on the left side:
(x + -0.3125)(x + -0.3125) = -0.77734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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