Express each of the complex number given in the Exercises 1 to 10 in the form a + ib.
3(7 + i7) + i(7 + i7)
Multiplying like-like terms,
⇒ 21 + 21i + 7i + 
⇒ 21 + 28i + 7× (-1) 
⇒ 14 + 28i
4
Express each of the complex number given in the Exercises 1 to 10 in the form a + ib.
3(7 + i7) + i(7 + i7)
Multiplying like-like terms,
⇒ 21 + 21i + 7i +
⇒ 21 + 28i + 7× (-1)
⇒ 14 + 28i