z^2+7z-10=8

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Solution for z^2+7z-10=8 equation:


Simplifying
z2 + 7z + -10 = 8

Reorder the terms:
-10 + 7z + z2 = 8

Solving
-10 + 7z + z2 = 8

Solving for variable 'z'.

Reorder the terms:
-10 + -8 + 7z + z2 = 8 + -8

Combine like terms: -10 + -8 = -18
-18 + 7z + z2 = 8 + -8

Combine like terms: 8 + -8 = 0
-18 + 7z + z2 = 0

Factor a trinomial.
(-9 + -1z)(2 + -1z) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(2 + -1z)' equal to zero and attempt to solve: Simplifying 2 + -1z = 0 Solving 2 + -1z = 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 + -1z = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1z = 0 + -2 -1z = 0 + -2 Combine like terms: 0 + -2 = -2 -1z = -2 Divide each side by '-1'. z = 2 Simplifying z = 2

Solution

z = {-9, 2}

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