(x-1)(x+5)(-3x+8)=0

=> x-1=0 hoặc x+5=0  hoặc -3x+8=0

=> x=1 hoặc x=-5 hoặc -3x=-8   <=>x=-8:-3=-11

1. If Liverpool is won, Terry will be upset
2. If the office is closed, Mike will be able to get in
4. If Cathy arrives a bit early, she can help her mother to get things ready.
5. If the party is go on all night, no one will want to do any work tomorrow.
6. If Alice misses the train, she can get the next one.
7. If Jack is going to enter the race, he'll probably win it.
8. If you don’t stop talking, you won’t understand the lesson.
9. If you fail to pay, they’ll cut off the electricity
10. If you touch that wire, you may get an electricity shock.