Question

1.]  Every quadratic polynomial can have at most
  (a) three zeros
(b) one zero
 (c) two zeros
(d) none of these

2.]  If x2 + 5px + 16 has no real roots, then
 (a) p>8/5
(b) -8/5<p<8/5
(c) p<-8/5
(d) none of these

3.] For ax2 + bx + c = 0, which of the following statement is wrong?
        (a) If b2 – 4ac is a perfect square, the roots are rational.
        (b) If b2 = 4ac , the roots are real and equal.
        (c) If b2 – 4ac is negative, no real roots exist.
        (d) If b2 = 4ac , the roots are real and unequal.

4]  The roots of the equation 9x2 – bx + 81 = 0 will be equal, if the value of b is
(a) ± 9
(b) ± 18
(c) ± 27
(d) ± 54

5.] Which of the following is not a quadratic equation?
  (a) 3x2 – 5x + 9
(b) x+1/x=1
 (c) x2 – 9x = 0
(d) x cube-2x-√5=0

6.] For what value of t is x=2/3  a solution of 7x2 + tx – 3 = 0
 (a) –6
(b) -1/6
 (c) 1/7
(d) 6

7.]The value of p for equation 2x2 – 4x + p = 0 to have real roots will be
        (a) p ≤ –2
(b) p ≥ 2
        (c) p ≤ 2
(d) p ≥ –2

8.] Which of the following has real roots?
a] x square + 2√3x-1=0
b] x square+2x+4=0
c] x square-x+1=0
d] 3x square -2x+2

9.]  If p = 1 and q = –2 are roots of equation x2 – px + q = 0 , then quadratic equation will be
        (a) x2 + 2x –1= 0
(b) x2 – x – 2 = 0
        (c) x2 – 2x + 1= 0
(d) x2 + x + 2 = 0

10.] Roots of quadratic equation x2 – 3x = 0 , will be
           (a) 3
(b) 0, –3
           (c) 0, 3
(d) none of these​
plz tell me ,

Answer 1

Answer:

1.two zeroes

2.none of these.

Answer 2

Answer:

1) c) two zero

2) c) p< -8/5

3) a) If b2 - 4ac is a perfect square, the root are rational.

4) +- 9

5) x cube-2x - root 5 = 0

6) d) 6

7) c) p <_2

8) b) x2 + 2x +4 =0

9) c) x2 - 2x +1 =0

10) b) 0, -3

I hope it will be helpful for you .

Thank you for your question.