Author's photo
Jiri S.
matematika

Upravte výraz: 5x ⋅ (x + y) – x ⋅ [y ⋅ (x + 2) – x ⋅ (y – 3) – 5(x + y)] – 3y(x – y)

2 odpovědí
5x²+5xy-x .(xy+2y-xy+3x-5x-5y-3xy+3y²)=
=5x²+5xy-x.(-3xy-2x-3y+3y²)=
=5x²+5xy+3x²y+2x²+3xy-3xy² = 7x²+3x²y+8xy-3xy²
=5х²+5ху-x[yx+2y-xy+3x-5x-5y]-3xy+3y²=5x²+5xy-x²y-2xy+x²y-3x²+5x²+5xy-3xy+3y²=7x²+5xy+3y²