3z^2-5z=8

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


Simplifying
3z2 + -5z = 8

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

Solving
-5z + 3z2 = 8

Solving for variable 'z'.

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

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

Factor a trinomial.
(-1 + -1z)(8 + -3z) = 0

Subproblem 1

Set the factor '(-1 + -1z)' equal to zero and attempt to solve: Simplifying -1 + -1z = 0 Solving -1 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1z = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1z = 0 + 1 -1z = 0 + 1 Combine like terms: 0 + 1 = 1 -1z = 1 Divide each side by '-1'. z = -1 Simplifying z = -1

Subproblem 2

Set the factor '(8 + -3z)' equal to zero and attempt to solve: Simplifying 8 + -3z = 0 Solving 8 + -3z = 0 Move all terms containing z to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -3z = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -3z = 0 + -8 -3z = 0 + -8 Combine like terms: 0 + -8 = -8 -3z = -8 Divide each side by '-3'. z = 2.666666667 Simplifying z = 2.666666667

Solution

z = {-1, 2.666666667}

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