2 câu trả lời
x3−5x2y−14y2x=x(x2−5xy−14y2)
=x(x2−7xy+2xy−14y2)
=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).
x3−5x2y−14y2x=x(x2−5xy−14y2)
=x(x2−7xy+2xy−14y2)
=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).