Question

Due to heavy storm an electric wire got bent as shown in the figure . It followed a mathematical

shape . Answer the following questions.

(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 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) 3,5 (d) x2

+2x+3

(v)

What is value of polynomial if x=-1?

(a) 6 (b) -18 (c) 18 (d) 0​

Answer 1

Answer:

খফহস্যফজাইজডনদয্যস্যসবগঞ্জসহজদ্গজফিউইওক্সিজজ

Answer 2

(i) parabola

(ii) (a) 2

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

(iv) (c) x²-2x-3

(v) (d) 0

Step-by-step explanation:

(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