Question

evaluate (7 x - 2y)²​

Answer 1

Answer:

identity to be used = (x-y)^2= x^2 + 2xy+y^2

Step-by-step explanation:

Replace x with 7x and y with 2y

(7x)^2 + (2y)^2 + 2 (7x)(2y)

49x^2 + 4y^2 + 28xy

hence evaluated