Question

The length of a rectangle is 5 more than its breadth so express its perimeter in the form of polynomials

Answer 1

hi,

 its given that  l = 5 + b

so perimeter of rectangle = 2 ( l + b)

                                           = 2( 5 + b + b)

                                           = 2(5 + 2b)

                                          = 10 + 4b

then if the perimeter is given we can find  b