5z^2-42z=27

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Solution for 5z^2-42z=27 equation:


Simplifying
5z2 + -42z = 27

Reorder the terms:
-42z + 5z2 = 27

Solving
-42z + 5z2 = 27

Solving for variable 'z'.

Reorder the terms:
-27 + -42z + 5z2 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + -42z + 5z2 = 0

Factor a trinomial.
(-3 + -5z)(9 + -1z) = 0

Subproblem 1

Set the factor '(-3 + -5z)' equal to zero and attempt to solve: Simplifying -3 + -5z = 0 Solving -3 + -5z = 0 Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -5z = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -5z = 0 + 3 -5z = 0 + 3 Combine like terms: 0 + 3 = 3 -5z = 3 Divide each side by '-5'. z = -0.6 Simplifying z = -0.6

Subproblem 2

Set the factor '(9 + -1z)' equal to zero and attempt to solve: Simplifying 9 + -1z = 0 Solving 9 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1z = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1z = 0 + -9 -1z = 0 + -9 Combine like terms: 0 + -9 = -9 -1z = -9 Divide each side by '-1'. z = 9 Simplifying z = 9

Solution

z = {-0.6, 9}

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