Latwe zadanie:   [latex](6x-2y)^{2}-3(4x+3y)^{2}+5(6x-3y)^{2}-7x(x+frac{3}{7})[/latex]   jesli wystepuje blad to bez texa: (6x-2y)^{2}-3(4x+3y)^{2}+5(6x-3y)^{2}-7x(x+frac{3}{7})

[latex]\(6x-2y)^{2}-3(4x+3y)^{2}+5(6x-3y)^{2}-7x(x+frac{3}{7})=\ 36x^2-24xy+4y^2-3(16x^2+24xy+9y^2)+5(36x^2-36xy+9y^2)-7x^2-3x=\ 36x^2-24xy+4y^2-48x^2-72xy-27y^2+180x^2-180xy+45y^2-7x^2-3x=\ 161x^2+22y^2-276xy-3x [/latex]

(6x-2y)^-3(4x+3y)^+5(6x-3y)^-7x(x+3/7) = =36x^-24xy+4y^-3(16x^+24xy+9y^)+5(36x^-36xy+9y^) -7x^-3x = =36x^-24xy+4y^-48x^-72xy-27y^+180x^-180xy+45y^-7x^-3x = =161x^ -276xy + 22y^ -3x =======================   (^ - kwadrat)