Question

(2y+5) (2y+5) use a suitable identity ​

Answer 1

Answer:

4y²+25+20y

Step-by-step explanation:

(2y+5) (2y+5) can be also written as (2y+5)²

so using identify (a+b)²=a²+b²+2ab

We can write

(2y+5)²=(2y)²+(5)²+2×2y×5

=4y²+25+20y