Question

Expand (⅞x + ⅘y)² using theorem/identities​

Answer 1

Answer:

using identity (a+b)^2= a^2 + b^2 + 2ab

we see

(7/8 x + 4/5 y)^2 = 49/64 x^2 + 16/25 y^2 + 7/5 xy