A(x)= (x^4 + 4x^2-5x +1)^1994
tinh tong cac he so cua hang tu cua da thuc nhan dc khi da khai trien va viet duoi dang thu gon.
phan tich 12n +4 +15 =21 thanh nhan tu
thu gon don thuc tim bac he so cua da thuc A=x^3 *(-5/4x^2y)*(2/5x^3y^4)
phan tich da thuc thanh nhan tu
a) x5 + x +1
b) 33 - 14x2 +4x + 3
cho da thuc P = (-2/3x^3y^2)(1/2x^2y^5) a) thu gon da thuc P roi xac dinh he so va phan bien cua don thuc ?
b) tinh gia tri cua P tai x = -1 , y =1
cho cac da thuc a=-1/2x^2yz^2 b=-3/4xy^2z^2 c=x^3y cmr cac da thuc a b c khong cung nhan gia tri am
(2x²y)²nhan 3phan4 xy²
a,thu gon don thuc va tim bac cua don thuc tren
thu gon da thuc va sap xep da thuc
f (x)=5x^2-1+3x+x^2-5x^2
phan tich da thuc thanh nhan tu
( a + b + c)3 - a3 - b3 - c3
8( x + y + z)3 - ( x+ y )3 - ( y + z )3 - ( z + x)3
