# The area of a rectangle is (15x square + 17xy - 18y square)sq.units. find the perimeter of the rectangle.

1
by sam11oscar

Log in to add a comment

by sam11oscar

Log in to add a comment

= 15x² + 27xy - 10xy - 18y²

= 3x(5x + 9y) - 2y(5x + 9y)

= (5x + 9y)(3x - 2y)

perimeter = 2(l + b)

= 2(5x + 9y + 3x - 2y)

= (16x + 14y) units.