Ответы и объяснения

2013-02-13T16:08:43+00:00

(3х+10y)²+(4х-8y)(4х+8y)=9x²+6-xy+100y²+(16x²-64y²)=25x²+36y²+60xy

2013-02-13T16:16:35+00:00

(3х+10y)^2+(4х-8y)(4х+8y)=9x^2+6-xy+100y^2+(16x^2-64y^2)=25x^2+36y^2+60xy