Question

Draw the Graph of x^2-1​

Answer 1

ANSWER

First, let us form a table for y=x2+3x+2

x−4−3−2−10123x21694101493x−12−9−6−30369222222222y6200261220

Plot the points (−4,6),(−3,2),(−2,0)),(1,6),(2,12) and (3,20)

Now, join the points by a smooth curve. The curve so obtained, is the graph of y=x2+3x+2.

Now, x2+2x+4=0

⇒ x2+3x+2−x+2=0

⇒ y=x−2          ∵ y=x2+3x+2

Thus the roots of x