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Rút gọn -3x (x+2)^2+(x+3)(x-1)(x+1)-(2x-3)^2

(4x+1)(12x-1)(3x+2)(x+1)-4=0 mọi người giải giúp em với ạ

Ngâm 22,6 g hỗn hợp ba kim loại Zn, Fe, Cu trong dung dịch H2SO4 loãng. Phản ứng xong thu được 3g chất rắn không tan và 6,72 lít khí ở đktc a/ Viết các pt xảy ra b/ Phần trăm khối lượng mỗi kim loại trong hỗn hợp Hứa vote đủ

Mọi người giúp em 2 câu này với ạ

Find the main clause for each of these If-clauses. 1 If you sell more than you did last year, ▢ he'll be out on his ear. ▢ I'll buy you a new car. ▢ you'll soon be on your way. ▢ you'll be in big trouble. 2 If you take my advice, ▢ Concorde is faster than a 747. ▢ I'll buy two. ▢ you'll keep a tighter control on what Jerome gets up to. ▢ you'll be in big trouble. 3 If he doesn't accept our offer, ▢ we'll have to withdraw. That's the most we can afford to pay. ▢ your job here will be quite safe. ▢ he'll be out on his ear. ▢ you won't be in any trouble. 4 If you give me a 10 % discount, ▢ you'll soon be on your way. ▢ your job here will be quite safe. ▢ I'll buy two. ▢ you'll be in big trouble. 5 If sales don't improve soon, ▢ we'll have to lay off some workers. ▢ your job here will be quite safe. ▢ I'll buy two. ▢ you'll keep a tighter control on what Jerome gets up to. 6 If the report isn't on my desk tomorrow morning, ▢ you'll be in big trouble. ▢ your job here will be quite safe. ▢ we'll have to lay off some workers. ▢ he'll be out on his ear. 7 If Nick doesn't mend his ways soon, ▢ you'll soon be on your way. ▢ your job here will be quite safe. ▢ you'll be in big trouble. ▢ he'll be out on his ear. 8 If I see you standing around the coffee machine talking again, ▢ you'll be in big trouble. ▢ your job here will be quite safe. ▢ we'll have to lay off some workers. ▢ he'll be out on his ear. 9 If you don't make the grade here, ▢ your job here will be quite safe. ▢ you'll soon be on your way. ▢ we'll have to lay off some workers. ▢ he'll be out on his ear. 10 Unless you do something really bad, ▢ your job here will be quite safe. ▢ you'll soon be on your way. ▢ you'll be in big trouble. ▢ he'll be out on his ear.

Giúp mik lm câu 2 với,mik sẽ vote 5 sao và ctlhn.

Rút gọn -3x?x+2)^2+(x+3)(x-1)(x+1)-(2x-3)^2

mik đang cần gấpppppppppppppppppppppp

làm giúp em câu b,c thôi ạ em cảm ơn nhiều