Question

Hihihi.Hi moi nguoi.Minh se dat mot cau hoi ve dai so lop 7,mong moi nguoi chi giai><,boi vi toan minh hoc chua gioi lam nen co cac bai toan con thac mac,len day de mong nhan duoc su giup do,de toan nhu sau:(1)Da thuc P(x)=x²⁰¹⁶  +2013x + 2012 co ngiem duong khong?Vi sao?. 2 Bai nua nhe(*^-^*): 

(2)Cho hai da thuc: M(x)=2,5² -0,5x-x³-1

                             1/2N(x)=-x³+2,5x²-6+2x

a)Tim A(x)=M(x)-N(x).Sau do tim mot ngiem cua da thuc A(x)

b)Tim da thucB(x) biet B(x)=M(x)+N(x).Cho biet bac cua da thuc B(x).

(3)Cho da thuc:f(x)=ab² + bx + c.Chung to neu f(x) co ngiem x=-1 thi b=a+c.

  MOT BAI NUA THOI MA.NHA NHA NHA MOI NGUOI^_^:

(4)Cho hai da thuc:A=(-1/2axy³)² va B=(-3a² x²)³ (a la hang so khac 0).

a)Tinh M=A.B roi cho biet he so va phan bien cua M

b)Tim bac cua M.

 AI CO CAU TRA LOI NHAN TIN TRA LOI CHO MINH BIET NHAAAAA.CAM ON!!!!!.