Question

Due to heavy storm an electric wire got bent as shown in the fig.
answer the following
(i) name the shape in which the wire is bent
(ii) how many zeroes are there for the polynomial
(a) 2. (b) 3. (c)1. (d)0
(iii) the zeroes of the polynomial are
(a)3,5. (b)-1,3. (c)-1,5. (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)6. (b)-18. (c)18. (d)0​

Answer 1

Answer:

(i)Parabola

(ii)2

(iii)-1,3

(iv)x2 - 2x -3

(v)0

Answer 2

Answer:

(i) parabola

(ii) (a) 2

(iii) (b) (-1,3)

(iv) (c) x²-2x-3

(v) (d) 0

Step-by-step explanation:

(ii) pints of intersection at x-axis

(iv) α=-1 β=3

α+β= -1 + 3 = 2

αβ = -1 x 3 = -3

x² - (α+β)X + αβ

=⟩ x² - (2)x +(-3)

x² - 2x - 3

(v) p(x) = x²- 2x - 3

p(-1) = (-1)² - 2(-1) - 3

= 1 + 2 - 3 = 0