Question

Complex number
1. Find the modulus of complex number: (3 + i)^2​

Answer 1

Answer:

10

Step-by-step explanation:

z = (3 + i)^2​ = (3 + i)²​ = 8+6i

modulus z = 10

Answer 2

Answer:

given complex number is

z = ( 3 + i)²

= 9 + i² + 6i

= 9 -1 + 6i

= 8 + 6i

so,

|z| = √8² + 6²

= √64 + 36

= √100 = 10.

Step-by-step explanation:

here, i = √-1

thus, i² = -1 .