15z^2+4z-4=0

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Solution for 15z^2+4z-4=0 equation:


Simplifying
15z2 + 4z + -4 = 0

Reorder the terms:
-4 + 4z + 15z2 = 0

Solving
-4 + 4z + 15z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-2 + -3z)(2 + -5z) = 0

Subproblem 1

Set the factor '(-2 + -3z)' equal to zero and attempt to solve: Simplifying -2 + -3z = 0 Solving -2 + -3z = 0 Move all terms containing z to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -3z = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3z = 0 + 2 -3z = 0 + 2 Combine like terms: 0 + 2 = 2 -3z = 2 Divide each side by '-3'. z = -0.6666666667 Simplifying z = -0.6666666667

Subproblem 2

Set the factor '(2 + -5z)' equal to zero and attempt to solve: Simplifying 2 + -5z = 0 Solving 2 + -5z = 0 Move all terms containing z to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -5z = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -5z = 0 + -2 -5z = 0 + -2 Combine like terms: 0 + -2 = -2 -5z = -2 Divide each side by '-5'. z = 0.4 Simplifying z = 0.4

Solution

z = {-0.6666666667, 0.4}

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