(z-15)(z+2)=

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Solution for (z-15)(z+2)= equation:


Simplifying
(z + -15)(z + 2) = 0

Reorder the terms:
(-15 + z)(z + 2) = 0

Reorder the terms:
(-15 + z)(2 + z) = 0

Multiply (-15 + z) * (2 + z)
(-15(2 + z) + z(2 + z)) = 0
((2 * -15 + z * -15) + z(2 + z)) = 0
((-30 + -15z) + z(2 + z)) = 0
(-30 + -15z + (2 * z + z * z)) = 0
(-30 + -15z + (2z + z2)) = 0

Combine like terms: -15z + 2z = -13z
(-30 + -13z + z2) = 0

Solving
-30 + -13z + z2 = 0

Solving for variable 'z'.

Factor a trinomial.
(-2 + -1z)(15 + -1z) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(15 + -1z)' equal to zero and attempt to solve: Simplifying 15 + -1z = 0 Solving 15 + -1z = 0 Move all terms containing z to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -1z = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -1z = 0 + -15 -1z = 0 + -15 Combine like terms: 0 + -15 = -15 -1z = -15 Divide each side by '-1'. z = 15 Simplifying z = 15

Solution

z = {-2, 15}

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