-3z+5=-8z^2

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Solution for -3z+5=-8z^2 equation:


Simplifying
-3z + 5 = -8z2

Reorder the terms:
5 + -3z = -8z2

Solving
5 + -3z = -8z2

Solving for variable 'z'.

Combine like terms: -8z2 + 8z2 = 0
5 + -3z + 8z2 = 0

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

Divide each side by '8'.
0.625 + -0.375z + z2 = 0

Move the constant term to the right:

Add '-0.625' to each side of the equation.
0.625 + -0.375z + -0.625 + z2 = 0 + -0.625

Reorder the terms:
0.625 + -0.625 + -0.375z + z2 = 0 + -0.625

Combine like terms: 0.625 + -0.625 = 0.000
0.000 + -0.375z + z2 = 0 + -0.625
-0.375z + z2 = 0 + -0.625

Combine like terms: 0 + -0.625 = -0.625
-0.375z + z2 = -0.625

The z term is -0.375z.  Take half its coefficient (-0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
-0.375z + 0.03515625 + z2 = -0.625 + 0.03515625

Reorder the terms:
0.03515625 + -0.375z + z2 = -0.625 + 0.03515625

Combine like terms: -0.625 + 0.03515625 = -0.58984375
0.03515625 + -0.375z + z2 = -0.58984375

Factor a perfect square on the left side:
(z + -0.1875)(z + -0.1875) = -0.58984375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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