Higher Engineering Mathematics

FUNCTIONS AND THEIR CURVES 207

C

y

6

4

2

− 6 − 4 − 2 0 2 4 6

− 2

− 4

− 6

− 8

− 10

x

y^ =

x−

2

y(x + 1) = (x − 3)(x + 2)

y(x + 1) = (x − 3)(x + 2)

x = − 1

Figure 19.34