Question

What is root-16 + root49 written as a complex number in the form a+bi?

Answer 1

`→√( - 16) + √(49)`

• We know that, i = √-1
• Form → a + ib

`→( √( - 1) * √(16) ) + ( √(49) )\\=i √(16)+√(49) \\ = 4i + 7 \\ = \boxed{7 + 4i}✓`

• (7 + 4i) is the right answer.