(3-i)-(-4+9i)=

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Solution for (3-i)-(-4+9i)= equation:


Simplifying
(3 + -1i) + -1(-4 + 9i) = 0

Remove parenthesis around (3 + -1i)
3 + -1i + -1(-4 + 9i) = 0
3 + -1i + (-4 * -1 + 9i * -1) = 0
3 + -1i + (4 + -9i) = 0

Reorder the terms:
3 + 4 + -1i + -9i = 0

Combine like terms: 3 + 4 = 7
7 + -1i + -9i = 0

Combine like terms: -1i + -9i = -10i
7 + -10i = 0

Solving
7 + -10i = 0

Solving for variable 'i'.

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

Add '-7' to each side of the equation.
7 + -7 + -10i = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -10i = 0 + -7
-10i = 0 + -7

Combine like terms: 0 + -7 = -7
-10i = -7

Divide each side by '-10'.
i = 0.7

Simplifying
i = 0.7

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