Question

Which is equivalent to the expression below? the quantity 2 minus 5 eye, close quantity, times the quantity 4 plus 7 eye,?

Answer 1

(2-5i)(4+7i)=2(4+7i)-5i(4+7i)=8+14i-20i-35i²
recall that i²=-1,
8-6i+35=43-6i
43-6i is the final answer