2 câu trả lời
$x^3-5x^2y-14y^2x = x(x^2 - 5xy - 14y^2)$
$= x(x^2 - 7xy + 2xy - 14y^2)$
$= x[x(x-7) + 2y(x-7)]$
$= x (x-7) (x+2y)$.
x³-5x²y-14y²x
=x(x²-5xy-14y²)
=x(x²+2xy-7xy-14y²)
=x[(x²+2xy)-(7xy+14y²)]
=x[x(x+2y)-7y(x+2y)]
=x(x+2y)(x-7y).
$x^3-5x^2y-14y^2x = x(x^2 - 5xy - 14y^2)$
$= x(x^2 - 7xy + 2xy - 14y^2)$
$= x[x(x-7) + 2y(x-7)]$
$= x (x-7) (x+2y)$.
x³-5x²y-14y²x
=x(x²-5xy-14y²)
=x(x²+2xy-7xy-14y²)
=x[(x²+2xy)-(7xy+14y²)]
=x[x(x+2y)-7y(x+2y)]
=x(x+2y)(x-7y).