phan tich cac da thuc sau thanh nhan tu
a, (x-y)3 - (z-y)3 - (x-z)3
b, (2016x-2015)3 + (2014-2013x)3 + ( 1-3x)3
c, (2a+b+c)3 - (a-b+2c)3 - (a+2b-c)3
cho P= (a-b)*(b-c)*(c-a). Phan tich P thanh nhan tu
a(b^2-c^2)+b(c^2-a^2)+c(a^2-b^2) phan tich da THUC THANH NHAN TU
phan tich da thuc sau thanh nhan tu:a^2.b^2.(a-b)+b^2.c^2(b-c)+a^2.c^2 .(c-a)
phan tich da thuc thanh nhan tu a(b^2+c^2)+b(c^2+a^2)+c(a^2+b^2)-2abc-a^3-b^3-c^3.
a^3(b-c)+ b^3(c-a)+c^3(a-b) phan tich da thuc thanh nhan tu
cao nhan naoo giup em voi
1.cmr voi a,b,c la cac so duong ta co: (a+b+c)(1/a+1/b+1/c)>hoac =9
2.giai bat phuong trinh (x+3)(x-3),(x-2)^2+3
EM XIN CHAN THANH CAM ON CAC VI CAO NHAN >_<
a(b^2-c^2)+b(c^2-a^2)+c(a^2-b^2) phan tich da thuc thanh nhan tu cac bn vao giup minh di
phan tich da thuc thanh nhan tu a(b^3-c^3)+b(c^3-a^3)+c(a^3-b^3)