Question

the area of a rectangular field is ( a² - 19a + 90 ) square units. find the width of the rectangular if its length is ( a - 9 ) units.

Answer 1

length of rectangle=area/width
l=( a² - 19a + 90 )/a-9

=(a-10)(a-9)/(a-9)
=a-10

so l =a-10

Answer 2

I think it will help you