Question

Expand using the identity :

a. ( 2x – 3y + z )2

b. (2pq + 5)3

c. (3p -
1
/3
q)3

Answer 1

Hello Mate!

Formula used :-

${(x + y)}^{3} = {x}^{3} + {y}^{3} + 3xy(x + y) \\ {(x - y)}^{3} = {x}^{3} - {y}^{3} - 3xy(x - y) \\ {(a + b + c)}^{2} \\ = {a}^{2} + {b}^{2} + {c}^{2} + 2(ab + bc + ca)$

Refer to attatchment.

Have great future ahead!