Question

expand each of the following using suitable identity of :(a) (3a-7b-c) 2 (b) (-2x+5y-3z)2 (c) [1\4a-1\2b+1]​

Answer 1

Answer:

Hope it may help you

Step-by-step explanation:

=>(3a)^2-(7b)^2-(c)^2 + 2[a(-b)+b(-c)+c(-a)

=>9a^2-49b^2-c^2+2(-ab-bc-ca)

=>9a^2+49b^2-c^2-2ab-2bc-2ca