Question

Case Study based-1

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

followed a mathematical shape. Answer the following question below.

i) Name the shape in which the wire is bent

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

ii) The zeroes of the polynomial are

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

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

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

iv) What will be the expression of the polynomial?

a) x2

-2x+3 b) x2+2x-3 c) x2

-5x+6 d) x2+5x-6

v) What is the value of the polynomial if x= -2?

a) 20 b) 0 c) -3 d) 11

18) Case Study based-2

Weight of the students, A teacher was used to calculate the weight of the​

Answer 1

Given : electric poles bent into the shape of parabolic which cut x axis at 2 and 3

To Find : the zeroes of the given curve.

The polynomial expression of given curve  

If x= -2, then find the value of polynomial.

Solution:

the zeroes of the given curve.  are   2 and 3 as  parabolic  cut x axis at  2 and 3

There are two zeroes

The polynomial expression of given curve is

= (x - 2)(x - 3)

= x² -5 x +6

x= -2

=> Value = (-2)² -5(-2) + 6  = 20

 

Learn more:

y = a(x − 2)(x + 4)In the quadratic equation above, a is a ...

brainly.in/question/13828215

Which equation represents a graph with a vertex at (–3, 2)? y = 4x2 ...

brainly.in/question/8866475

Answer 2

Step-by-step explanation:

i) Ans (d) Parabola

iii) Ans a) 2

iv) The polynomial should be in this form

$ax ^{2} + bx + c$