sederhanakanlah?( 3xkuadrat-xykuadrat) (5xkuadrat+2xykuadrat-1)

(3x² - xy²)(5x² + 2xy² - 1)=(3x²×5x²)(3x²×2xy²)(3x²×-1)(-xy²×5x²)(-xy²×2xy²)(-xy²×-1)
                                    = 15x⁴ + 6x⁴ - 3x² - 5x³y² - 2x²y⁴ + 1xy²
                                    = 21x⁴ - 3x² - 5x³y² - 2x²y⁴ + 1xy²

[tex] (3x^{2} -x y^{2})(5 x^{2} +2x y^{2} -1)= \\ 15 x^{4} +6 x^{3} y^{2} -3 x^{2} -5 x^{3} y^{2} -2 x^{2} y^{4} +x y^{2} = \\ 15 x^{4} + x^{3} y^{2} -3 x^{2} -2 x^{2} y^{4} +x y^{2} [/tex]