Question

9. Simplify the expression.(-5 + 47)(2 + 67)-10 + 24-34 - 22;14 - 221-10 - 221

Answer 1

Step 1: Write out the expression

$(-5+4i)(2+6i)$

Step 2: Expand the expression

$(-5+4i)(2+6i)=-5(2+6i)+4i(2+6i)$$=-10-30i+8i+24i^2=-10-22i+24(-1)$$=-10-24-22i=-34-22i$

Hence the expression simplified is -34 - 22i