Question

using the suitable identies expand the following (1.1x+0.2y)^2

Answer 1

(1.1x+0.2y)^2

According to the identities, (a + b)^2 = a^2 + 2ab + b^2

Let a be 1.1x and b be 0.2y.

Applying the identity in (1.1x+0.2y)^2,

= (1.1x)^2 + 2*1.1x*0.2y + (0.2y)^2

= 1.21x^2 + 0.44xy + 0.04y

Hope it helps :)