Question

draw the graph of the polynomial x2-3x-4 and find it zeors from the graph​

Answer 1

Answer:

graph of p(x) is given above.

Clearly, from the graph x=−4,1 are zeros of p(x).

Verification:-

p(−4)=(−4)

2

+3×−4−4=16−12−4=0

p(1)=(1)

2

+3×1−4=1+3−4=0

Answer 2

Answer:

 If x = 0, ⇒ y= 02  -  3(0) -  4 = - 4 If x = 1 ⇒ y= 12 -  3(1) -  4 = - 4 = 1 - 3 - 4 = - 6 If x = -1 ⇒ y = y= (-1)2  -  3(-1) -  4 = 1+3 - 4 = 0 If x = 4 ⇒  y = (-1)2   -  3(4) -  4 = 16 - 12 - 4 = 0 The coordinate points of the given equation are

x

0

1

- 1

4

y

- 4

- 6

0

0