tolongg yaa..............

r=(t³-2t²)i+(3t²)j
t=1 ---› r=(1³-2×1²)i+(3×1²)j = -i+3j
t=2 ---› r=(2³-2×2²)i+(3×2²)j= 12j

V={(12j)-(-i+3j)}/(2-1)
V= -i+9j
V=√82