Question

1. Find the following by using Identity-1 (1) (2x+5)²​

Answer 1

Step-by-step explanation:

(2x+5)²​

= (2x)² + 2 (2x) (5) + (5)²        

Identity used : (a+b)² = a²+2ab+b²        

= 4x² + 20x + 25

May the answer helps you :)

Answer 2

Step-by-step explanation:

-1(1) (2x+5)2

-1-1-2x-5+2

-2-2x-5+2

-2x-7+2

-2x-5

x=-5+2

x=-3