Question

The two adjacent sides of a rectangle are 5$x^2$ - 3$y^2$ and $x^2$ + 2$xy$ . Find its perimeter.

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Perimeter of a rectangle (P) = 2(l + b)

P= 2 {(5$x^2$ - 3$y^2$ ) + ( $x^2$ + 2$xy$ )}

P= 2 {5$x^2$ - 3$y^2$ + $x^2$ + 2$xy$}

P= 2 {6$x^2$ - 3$y^2$ + 2$xy$}

P= 12$x^2$ - 6$y^2$ + 4$xy$