\(x^3+3x^2+3x+2\)

\(=\left(x+2\right)\left(x^2+x+1\right)\)

\(x^3+3x^2+3x+2\)

\(=x^3+2x^2+x^2+2x+x+2\)

\(=x^2\left(x+2\right)+x\left(x+2\right)+\left(x+2\right)\)

\(=\left(x+2\right)\left(x^2+x+1\right)\)

\(x^3+3x^2+3x+2\)

\(=x^3+2x^2+x^2+2x+x+2\)

\(=x^2\left(x+2\right)+x\left(x+2\right)+\left(x+2\right)\)

\(=\left(x+2\right)\left(x^2+x+1\right)\)

\(x^3+3x^2 +3x+2\)

\(=x^3+x^2+x+2x^2+2x+2\)

\(=x\left(x^2+x+1\right)+2\left(x^2+x+1\right)\)

\(=\left(x+2\right)\left(x^2+x+1\right)\)

1a) \(=-\left(x^3-3x^2+3x-1\right)=-\left(x-1\right)^3\)

b) \(=-\left(x^3-3x^2+3x-1\right)=-\left(x-1\right)^3\)

\(a,=-\left(x-1\right)^3\left[=\left(1-x\right)^3\right]\\ b,=\left(1-x\right)^3\)

a. \(=-\left(x^3-3x^2+3x-1\right)=-\left(x-1\right)^3\)

b. \(=\left(1-x\right)^3\)

a)3x²+9x-30=3x²+15x-6x-30=(3x²-6x)+(15x-30)=3x(x-2)+15(x-2)=(3x+15)(x-2)

b)3x²-5x-2=3x²-6x+x-2=(3x²-6x)+(x-2)=3x(x-2)+(x-2)=(3x+1)(x-2)

a) \(x^3+3x^2+3x=0\Rightarrow x\left(x^2+3x+3\right)=0\Rightarrow x\left[\left(x+\dfrac{3}{2}\right)^2+\dfrac{3}{4}\right]=0\Rightarrow x=0\)

(do \(\left(x+\dfrac{3}{2}\right)^2+\dfrac{3}{4}\ge\dfrac{3}{4}>0\))

b) \(x^3+6x^2+12x=0\Rightarrow x\left(x^2+6x+12\right)=0\Rightarrow x\left[\left(x+3\right)^2+4\right]=0\Rightarrow x=0\)

(do (x+3)²+4≥4>0)

a: Ta có: \(x^3+3x^2+3x=0\)

\(\Leftrightarrow x\left(x^2+3x+3\right)=0\)

hay x=0

b: Ta có: \(x^3+6x^2+12x=0\)

\(\Leftrightarrow x\left(x^2+6x+12\right)=0\)

hay x=0

Mình nghĩ bạn nên dùng web Wolfram|Alpha: Computational Intelligence để phân !

Máy mình window XP quá lỗi thời nên không làm được nha bạn ~

Bạn nhập là:factor 2x^4+3x^3+2x^2+3 là ok nhé !

=2x^2(x^2+1)+3(x^3+1)

=2x^2(x^2+2x+1)+(3x-3)(x^2+2x+1)

=(x^2+2x+1)(2x^2+3x-3)

ko có cách nào hết

\(3x^2+4x+x^2-4\\ =4x^2+4x-4\\ =4\left(x^2+x-1\right)\)