Question

the perimeter of a rectangle of length(x+y)cm and width (x-y)cm is:​

Answer 1

length = x+y cm

width = x-y cm

perimeter = (x+y)+(x+y)+(x-y)+(x-y)

=2(x+y) + 2(x-y)

=2x + 2y + 2 x - 2y

=4x + 2y - 2y

= 4x cm