Question

ERCISE 6.5
1. Draw the graph of f(x) = x2 – 3x – 4. Hence, discuss the sign of x2 – 3x - 4
the following quadratic functions :​

Answer 1

Answer:

The 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