RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 2. Polynomials

Subject: Maths - Class 10th

Q. No. 22 of CCE - Formative Assessment

Listen NCERT Audio Books to boost your productivity and retention power by 2X.

22

If two zeros of x3 + x2 – 5x – 5 are √5 and –√5 , then its third zero is

Given,


x3 + x2 – 5x – 5


Zeros = √5 and – √5


x2 – 5 is a root



(x2 – 5)(x + 1) = 0


x = – 1


So,


The third zero is – 1

Chapter Exercises

More Exercise Questions

8

The sum and product of the zeros of a quadratic polynomial are and — 3 respectively. What is the quadratic polynomial?