Question

Simplify
(5+i) (2+3i)

Answer 1

7+17i

Explanation:

(5+i)(2+3i)

Multiply complex numbers 5+i and 2+3i like you multiply binomials.

By definition,
`i^(2)` is -1.

5×2+5×(3i)+2i+3(−1)

Do the multiplications.

10+15i+2i−3

Combine the real and imaginary parts.

10−3+(15+2)i

Do the additions.

7+17i

Answer 2

5+1=6,2+3=5 6times 5is equal 30