Phan tich da thuc thanh nhan tu

M=\(a\left(b^2-c^2\right)+b\left(c^2-a^2\right)+c\left(a^2-b^2\right)\)

Tim x sao cho :

\(1+6x-6x^2-x^3=0\)

tim x sao cho:

\(x^4-2x^3-2x^2+3x+2=0\)

Rút gọn :

B=\(\left(a+b+c\right)^3+\left(a-b-c\right)^3\left(b-c-a\right)^3+\left(c-a-b\right)^3\)

Rút gọn:

B=\(\left(a+b+c\right)^3+\left(a-b-c\right)^3+\left(b-c-a\right)^3+\left(c-a-b\right)^3\)