Bài 2:
a: \(x^3+3x^2+3x+1=\left(x+1\right)^3\)
a: \(x^3-3x^2+3x-1=\left(x-1\right)^3\)
b: \(x^3+6x^2+12x+8=\left(x+2\right)^3\)
b: \(x^3-6x^2+12x-8=\left(x-2\right)^3\)
c: \(x^3+9x^2+27x+27=\left(x+3\right)^3\)
c: \(x^3-9x^2+27x-27=\left(x-3\right)^3\)
d: \(x^3+3x^2y+3xy^2+y^3=\left(x+y\right)^3\)
d: \(x^3-3x^2y+3xy^2-y^3=\left(x-y\right)^3\)
Bài 1:
a: \(\left(x+1\right)^3=x^3+3x^2+3x+1\)
a: \(\left(x-1\right)^3=x^3-3x^2+3x-1\)
a: \(\left(x+1\right)\left(x^2-x+1\right)=x^3+1\)
b: \(\left(x+2\right)^3=x^3+6x^2+12x+8\)
b: \(\left(x-2\right)^3=x^3-6x^2+12x-8\)
b: \(\left(x-2\right)\left(x^2+2x+4\right)=x^3-8\)
c: \(\left(x+3\right)^3=x^3+9x^2+27x+27\)
c: \(\left(3-x\right)^3=27-27x+9x^2-x^3\)
c: \(\left(2x+3\right)\left(4x^2-6x+9\right)=8x^3+27\)
d: \(\left(2x+1\right)^3=8x^3+12x^2+6x+1\)
d: \(\left(2x-y\right)^3=8x^3-6x^2y+12xy^2-y^3\)
d: \(\left(5-y\right)\left(25+5y+y^2\right)=125-y^3\)
