Question

Sq of side [a+b]. Therefore its area is [a+b] ² . Hence the algebraic expression [a+b]²=a2+2ab+b 2
here the side is 9 of Square ​

Answer 1

Answer:

Here it is not clearly written what to answer but I am assuming you are asking for the area of square with side 9 units.

The answer is 81 square units.

Step-by-step explanation:

Formula for area of square.

$a^2$ = axa

= 9 x 9

= 81 square units