Question

$Evaluate:$
$(2y+5)(2y+5)$

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

We know, $(a+b{)}^2=a^2+2ab+b^2$
So,$(2y+5)(2y+5)$ can also be written as
$(2y+5{)}^2$

$=(2y{)}^2+(2\times 2y\times 5)+5^2$
$[Herea=2y,b=5]$
$=4y^2+20y+25$