Question

The length and breadth of rectangle are the zeroes of the polynomial P(x)= x square - 10x + k.Find its perimeter.

Answer 1

Let length be L and breadth be B.

L+B=10 (by P(x))

So, perimeter is 2(L+B)=2×10=20

Answer 2

let length of rectangle is L
and breadth of reactangle is B
than according to the question.
sum of zeroes is =-b/a
so , L+B =10
perimeter =2(L+B)
2(10)
20