Question

Simplify the expression: (3 − 7i)(2 − 5i)

Answer 1

—29 - —29i

Explanation:

Answer 2

( 3 - 7i) • ( 2 - 5i) = ( - 29 - 29i)

Explanation:

The formula is :

(a+bi) • (x+yi) = ax+by•i^2+(ay+bx)i

and since i^2 = -1 it can be written as :

ax - by + (ay + bx) i

( 3 - 7i) • ( 2 - 5i) =

( - 29 - 29i)