A square has an area of 81 inches. if the side lengths of the square are each mutlipied by 2, find the area of the new square

The area of the new square=324 in²

Step-by-step explanation:

The area of a square can be expressed as;

A=L*L

where;

A=area of the square

And since the sides of a square are equal, they can be expressed as;

L=length of one side

L=length of the other side

In our case;

L=unknown

A=81 in²

replacing;

81=L²

√L²=√81

L=9

Multiply side length by 2

9*2=18 inches

The new area can be expressed as;

A=18²=324 in²

The area of the new square=324 in²