Question

4. Use a suitable identity to get each of
the following products:
(2y + 5) (2y - 5)​

Answer 1

Step-by-step explanation:

(2y+5)(2y-5)

=(2y)^2-(5)^2

=4y^2-25

Answer 2

Answer:

(2y+5)(2y+5)

Using,

(a+b)2=a2+2.a.b+b2 we get the above equation.

=(2y+5)2

=(2y)2+2.2y.5+52

=4y2+20y+25

hope it helps you dear friend