(6-9i)(9+i)=0

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Solution for (6-9i)(9+i)=0 equation:


Simplifying
(6 + -9i)(9 + i) = 0

Multiply (6 + -9i) * (9 + i)
(6(9 + i) + -9i * (9 + i)) = 0
((9 * 6 + i * 6) + -9i * (9 + i)) = 0
((54 + 6i) + -9i * (9 + i)) = 0
(54 + 6i + (9 * -9i + i * -9i)) = 0
(54 + 6i + (-81i + -9i2)) = 0

Combine like terms: 6i + -81i = -75i
(54 + -75i + -9i2) = 0

Solving
54 + -75i + -9i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '3'.
3(18 + -25i + -3i2) = 0

Factor a trinomial.
3((2 + -3i)(9 + i)) = 0

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

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

Solution

i = {0.6666666667, -9}

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