What is (6+9i)-(-3-i) ?

The solution to (6+9i)-(-3-i) is 9+10i

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simplify (6+9i)-(-3-i)

simplify

(6 + 9 i) - (- 3 - i)

9 + 10 i

Solution steps

(6 + 9 i) - (- 3 - i)

Group the real part and the imaginary part of the complex number

(a + bi) - (c + d i) = (a - c) + (b - d) i

= (6 - (- 3)) + (9 - (- 1)) i

Simplify

(6 - (- 3)) + (9 - (- 1)) i : 9 + 10 i

= 9 + 10 i

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