Question

solve by using indenity (2a+5)2​

Answer 1

ANSWER

$\huge\sf\pink{ →4a^2+25+20a }$

EXPLANATION

$\sf\red{by\: using -: (a+b)^2=> a^2+b^2+2ab }$

$\sf\blue{(2a+5)^2 => (2a)^2+(5)^2+2(2a×5)}$

⠀⠀⠀⠀⠀⠀⠀⠀ $\sf\purple{ => 4a^2+25+2(10a)}$

$\huge\sf\green{ → 4a^2+25+20a }$