Question

Each side y of a square is increased by 5 units.Which expression represents the number of square units in the area of the new square?

Answer 1

We have a square with side y

we are told that ewach side is increase by 5 units

then the new side is

y+5

now, the area pf the square is a^2

thus

`A=(y+5)^2`

Given the following formula

`(a+b)^2=(a^2+2ab+b^2)`

Reaplicing for our values

where

a=y

b=5

`A=y^2+2*(y)*(5)+5^2`

`A=y2+10y+25`

answer is B