(-3z^2+8z-12)-(8z^2+z)=

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


Simplifying
(-3z2 + 8z + -12) + -1(8z2 + z) = 0

Reorder the terms:
(-12 + 8z + -3z2) + -1(8z2 + z) = 0

Remove parenthesis around (-12 + 8z + -3z2)
-12 + 8z + -3z2 + -1(8z2 + z) = 0

Reorder the terms:
-12 + 8z + -3z2 + -1(z + 8z2) = 0
-12 + 8z + -3z2 + (z * -1 + 8z2 * -1) = 0
-12 + 8z + -3z2 + (-1z + -8z2) = 0

Reorder the terms:
-12 + 8z + -1z + -3z2 + -8z2 = 0

Combine like terms: 8z + -1z = 7z
-12 + 7z + -3z2 + -8z2 = 0

Combine like terms: -3z2 + -8z2 = -11z2
-12 + 7z + -11z2 = 0

Solving
-12 + 7z + -11z2 = 0

Solving for variable 'z'.

Begin completing the square.  Divide all terms by
-11 the coefficient of the squared term: 

Divide each side by '-11'.
1.090909091 + -0.6363636364z + z2 = 0

Move the constant term to the right:

Add '-1.090909091' to each side of the equation.
1.090909091 + -0.6363636364z + -1.090909091 + z2 = 0 + -1.090909091

Reorder the terms:
1.090909091 + -1.090909091 + -0.6363636364z + z2 = 0 + -1.090909091

Combine like terms: 1.090909091 + -1.090909091 = 0.000000000
0.000000000 + -0.6363636364z + z2 = 0 + -1.090909091
-0.6363636364z + z2 = 0 + -1.090909091

Combine like terms: 0 + -1.090909091 = -1.090909091
-0.6363636364z + z2 = -1.090909091

The z term is -0.6363636364z.  Take half its coefficient (-0.3181818182).
Square it (0.1012396694) and add it to both sides.

Add '0.1012396694' to each side of the equation.
-0.6363636364z + 0.1012396694 + z2 = -1.090909091 + 0.1012396694

Reorder the terms:
0.1012396694 + -0.6363636364z + z2 = -1.090909091 + 0.1012396694

Combine like terms: -1.090909091 + 0.1012396694 = -0.9896694216
0.1012396694 + -0.6363636364z + z2 = -0.9896694216

Factor a perfect square on the left side:
(z + -0.3181818182)(z + -0.3181818182) = -0.9896694216

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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