Question

২.
সরল কর;
ক) (7p + 3q – 5)2 – 2(7p + 3q – 5r) (8p – 4q – 5r) + (8p – 4q – 5)2
C​

Answer 1

Answer:

Let,

7p+3q-5 = a

8p-4q-5 = b

a^2 - 2ab - b^2

=(a-b)^2

= (7p+3q-5-8p+4q+5)^2

=(7q-p)^2

=49q^2 -14pq +p^2