(15+5i)+(-10-9i)=

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Solution for (15+5i)+(-10-9i)= equation:


Simplifying
(15 + 5i) + (-10 + -9i) = 0

Remove parenthesis around (15 + 5i)
15 + 5i + (-10 + -9i) = 0

Remove parenthesis around (-10 + -9i)
15 + 5i + -10 + -9i = 0

Reorder the terms:
15 + -10 + 5i + -9i = 0

Combine like terms: 15 + -10 = 5
5 + 5i + -9i = 0

Combine like terms: 5i + -9i = -4i
5 + -4i = 0

Solving
5 + -4i = 0

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Add '-5' to each side of the equation.
5 + -5 + -4i = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -4i = 0 + -5
-4i = 0 + -5

Combine like terms: 0 + -5 = -5
-4i = -5

Divide each side by '-4'.
i = 1.25

Simplifying
i = 1.25

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