Class-X Ch-2 Polynomials (Maths Assignment)
1. Divide x3-3x2-x+3 by x+1 and verify the division algorithm.
2. Verify that 3,-1,- are the zeros of cubic poly. P(x)= 3x3-5x2-11x-3 and then verify
    the relationship between the zeros and coeffs.
3. Find all the zeros of 2x4-3x3-3x2+6x-2 if two of its zeros are 2 and  2 .
4. On dividing x4+x3-2x2-5x-15 by the poly. g(x), the quotient and remainder were x2-5 and
   zero resp, find g(x)
5. Give one example of poly p(x),g(x),q(x) and r(x) which satisfy the division algorithm
    P(x)=g(x),q(x) and r(x)                    deg r(x)< deg g(x)' and deg p(x)= deg g(x)+1
6. Obtain all the zeros of poly. 3x3-5x2-11x-3
7. If the poly 6x4+8x3+17x2+21x+7 is divided by another polynomial                         3x2+4x+1 the
   remainder comes out to be (ax+b) find a and b.
                                                                              1   1
                                                                                       .
8. If  ,  are zeros of poly 4x2+3x+7 find the value (i)  2+  2        (ii)   
9. If  ,  are zeros of x2-6x+k . What is value of k if 3 +2  =20
10. Find zeros of x2- 4 3 x-15 by factorisation method & verify relation                       between
zeros & coeffs. Of poly.
11. If  ,  are zeros of poly P(x) = x2-5x+k such that  -  =1, find the value of k.
                                                                                                  21
12. If  ,  are zeros of poly P(x)=2x2+5x+k. Satisfying the relation  2+  2+  =                   4
then find the value of k for this is to be possible.
13. If  ,  are zeros of quad. Poly f(x)=x2-px+q prove that
      
         =
14. If  ,  are zeros of quad. poly
    f(x)=x2-p(x+1)-c show that ( +1) (  +1)=1-c
15. If  ,  are zeros of quad. poly
                                                           1          1
    f(x)=x2-3x-2 find a quad. Poly where zeros are 2   and 2 
16. Find the condition that zeros of poly
        f(x)=x3+3px2+3qx+r may be in A.P
17. Find zeros of x3+5x2-2x-6 if two of its zeros are  2
18. Write the zeros of 4x2-7
19. Write the zeros of 100x2 - 81
Answers:
1. Q= x2-4x+3, R=0
     1
3.       2 and 1
4. x2+x+3
5. Any
               3
6. 3,  5
7. a=1,b=2
 8. 9  14  9  56  47 (i)  47 (ii)  3
     6     4       16   16       16       7
9.  =8,  =-2, k= -16 .
10. x=-5 3 , 3
11. k=6
12. k=2
                    9        1
15. f(x)=x2 - 16 x + 16
16. 2p2-3pq+r=0
17. + 2 ,- 2 ,-3
           7
18.  2
           9
19. 10