Skico vijat e mëposhtme dhe trego qartë pikat e prerjes me boshtet:
- y=(x+1)(x+2)(x+3)(x+4)
- y=x(x−1)(x+3)(x−2)
- y=x(x+1)2(x+2)
- y=(2x−1)(x+2)(x−1)(x−2)
- y=x2(4x+1)(4x−1)
- y=−(x−4)2(x−2)2
- y=(x−3)2(x+1)2
- y=(x+2)3(x−3)
- y=−(2x−1)3(x+5)
- y=(x+4)4