(12+3i)-(2-5i)=

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Solution for (12+3i)-(2-5i)= equation:


Simplifying
(12 + 3i) + -1(2 + -5i) = 0

Remove parenthesis around (12 + 3i)
12 + 3i + -1(2 + -5i) = 0
12 + 3i + (2 * -1 + -5i * -1) = 0
12 + 3i + (-2 + 5i) = 0

Reorder the terms:
12 + -2 + 3i + 5i = 0

Combine like terms: 12 + -2 = 10
10 + 3i + 5i = 0

Combine like terms: 3i + 5i = 8i
10 + 8i = 0

Solving
10 + 8i = 0

Solving for variable 'i'.

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

Add '-10' to each side of the equation.
10 + -10 + 8i = 0 + -10

Combine like terms: 10 + -10 = 0
0 + 8i = 0 + -10
8i = 0 + -10

Combine like terms: 0 + -10 = -10
8i = -10

Divide each side by '8'.
i = -1.25

Simplifying
i = -1.25

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