z^2-2z-17=7

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Solution for z^2-2z-17=7 equation:


Simplifying
z2 + -2z + -17 = 7

Reorder the terms:
-17 + -2z + z2 = 7

Solving
-17 + -2z + z2 = 7

Solving for variable 'z'.

Reorder the terms:
-17 + -7 + -2z + z2 = 7 + -7

Combine like terms: -17 + -7 = -24
-24 + -2z + z2 = 7 + -7

Combine like terms: 7 + -7 = 0
-24 + -2z + z2 = 0

Factor a trinomial.
(-4 + -1z)(6 + -1z) = 0

Subproblem 1

Set the factor '(-4 + -1z)' equal to zero and attempt to solve: Simplifying -4 + -1z = 0 Solving -4 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1z = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1z = 0 + 4 -1z = 0 + 4 Combine like terms: 0 + 4 = 4 -1z = 4 Divide each side by '-1'. z = -4 Simplifying z = -4

Subproblem 2

Set the factor '(6 + -1z)' equal to zero and attempt to solve: Simplifying 6 + -1z = 0 Solving 6 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1z = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1z = 0 + -6 -1z = 0 + -6 Combine like terms: 0 + -6 = -6 -1z = -6 Divide each side by '-1'. z = 6 Simplifying z = 6

Solution

z = {-4, 6}

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