zapisz jak najprościej
e)8x(x+y)-2y(y-x)+1/2(6x^2+8x^2)-2(y^2+5xy)=
8x^2+8xy-2y^2+2xy+3x^2+4x^2-2y^2-10xy=
13x^2-4y^2
8x(x+y)-2y(y-x)+1/2(6x^2+8x^2)-2(y^2+5xy)=
=8x^2+8xy-2y^2+2xy+3x^2+4x^2-2y^2-10xy=
=15x^2-4y^2Gotowe! : )
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e)8x(x+y)-2y(y-x)+1/2(6x^2+8x^2)-2(y^2+5xy)=
8x^2+8xy-2y^2+2xy+3x^2+4x^2-2y^2-10xy=
13x^2-4y^2
8x(x+y)-2y(y-x)+1/2(6x^2+8x^2)-2(y^2+5xy)=
=8x^2+8xy-2y^2+2xy+3x^2+4x^2-2y^2-10xy=
=15x^2-4y^2
Gotowe! : )