Question

Using suitable identity find a) (2x-5y)²​

Answer 1

Answer:

Step-by-step

(a + b)2 = a2 + 2ab + b2

(2x + 5y)²  = (2x)2 + 2 (2x)(5y) + (5y)2

= 4x2 + 20 xy + 25 y2

Answer 2

Answer:

(2x-5y)²

=(2x-5y) (2x-5y)