Вправи 201 - 300 » 203

203. Спростіть вираз: 1) (〖14a〗^2 b^2)/5xy • (〖10x〗^2 y^3)/(〖21a〗^2 b^3 ) • 〖3b〗^3/4y = (〖14a〗^2 b^2 • 〖10x〗^2 y^3• 〖3b〗^2)/(5xy •21a^2 b^3 •4y) = (〖12a〗^2 b^4 x^2 y^3)/(〖12a〗^2 b^3 xy^2 ) = bxy; 2) (x^2+ y^2+ 2xy)/(x^2- y^2 ) • (x^3- y^3)/(xy+ x^2+y^2 ) = (〖(x〗^2+ y^2+ 2xy) •(x^3- y^3))/(〖(x〗^2- y^2) •(xy+ x^2+ y^2)) = (〖(x+y)〗^2 •(x-y)(x^2+ xy+ y^2))/((x-y)(x+y)(x^2+ xy+ y^2)) = x + y.