2(x²-xy+y²) - (2x²+xy+3y²) tolong ya pake cara

[tex]2(x {}^{2} - xy + y {}^{2} ) - (2x {}^{2} + xy \\ + 3y {}^{2} ) \\ = 2x {}^{2} - 2xy + 2y {}^{2} - 2x {}^{2} + \\ xy + 3y {}^{2} \\ = - xy + 5y {}^{2} [/tex]