Question

if the highway overpass is represented by x-2x -8. Then Its befes ale 1
() (2, 4) h) 14,-2) (5) 1-2,-2) (iv) (-4,-41
(b) The highway overpass is represented graphically. Zeroes of a polynomiki
1
can be exprossed graphically. Number
of seroes of polynomial is equal to
number of points where theraph of polynomial
fi) Internects x-axis
(ii) Intersects y-axis
un Intersects y-axis ar x-axis fivi None of the above
(c) Graph of a quadratio polynomial is a
1
fu) straight line () circle (parabola livellipne
The representation of Highway Underpass whose one zero is 6 and sum
1
of the beroes is 0, is
1:0) - 6x + 2 (ul) -36 () X- 6livix - 3
(e) The number of zeroes that polynomial fbx) = x - 2)2 + 4 can have is: 1
(1) 1 (ii) 2 (i) O livi 3
15. 100m RACE
A stopwatch was used to find the time that it Yook
group of students to run 100m.​

Answer 1

Given : highway overpass is represented by x² - 2x - 8

To Find : Zeroes

 (2, 4) ,  (4,-2) , (2,-2) (iv) (-4,-4)

Solution:

x² - 2x - 8  = 0

x² - 4x + 2x - 8 =0

=> x(x - 4) + 2(x - 4) = 0

=> (x - 4)(x + 2) = 0

x = 4 , x = - 2

(4 , - 2) are zeroes

Number  of zeroes of polynomial is equal to  number of points where the graph of polynomial Intersects x-axis

Graph of a quadratic polynomial is parabola

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