Question

Write the sum or difference in the standard form a + bi. ( 7 + 5i) - ( -9 + i)

Answer 1

(7 + 5i) - ( -9 + i)
= 7 + 5i - (-9) - (i)
= 7 + 5i + 9 - i
= 16 + 4i

= 4i + 16