Evaluate 18

Evaluate the expression (-4-7i)-(-6-9i) and write the result in the form a+bi (Real + i* Imaginary).

Correct answer:

x = 2+2i

Step-by-step explanation:

a = 47i b = 6 9i  x = ab  R=4(6)=2 I=7(9)=2  x=2+2i

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