Question

A park has swings made of rubber and iron chain. Sachin who is studying in class X

have noticed that this is a Mathematical shape, he has learned in Maths class.

Following questions raised in his mind. Answer the questions by observing both

pictures :

(i) Name the shape in which the wire is bent.

a) Spiral b) ellipse c) linear d) Parabola

(ii) How many zeroes are there for the polynomial (shape of the wire)?

a) 2 b) 3 c) 1 d) 0

(iii) The zeroes of the polynomial are

a) -1, 5 b) -1, 3 c) 3, 5 d) -4, 2

(iv) What will be the expression of the polynomial?

a) x2

+2x -3 b) x2

-2x +3 c) x2

- 2x -3 d) x2 +2x+3

(v) What is the value of the polynomial if x = 1?

a) -4 b) 5 c) -5 d) 6
Tell me please fast ​

Answer 1

1 (d) - PARABOLA

2 (a) - 2 .. because the no. of zeroes in co ordinate geometry denoted by how much times the temporary line is passing through x axis .

3 (b) (-1,3) ...where line crossed is zeroes.

4(c) (x^2-2x-3 ) as taking -1 alpha and 3 bieta and putting in formula x^2-(ALPHA +BIETA) x-3=0

5 (a) -4

Answer 2

Answer:

1) d)Parabola

2) a)2

3) b) -1,3

4) c) x²-2x-3

5) a) -4