Question

Simplify (6 +i)(8 – 3i)

51 – 10i
48 – 32i
45 – 10i
48 – 10i – 3i^2

Answer 1

48-18i+8i+3=51-10i

Answer 2

Assuming i is the square root of -1
\[(6+i)(8-3i) = 48-18i+8i-3i^2\]
\[= 48-10i+3\]
\[= 51-10i\]