√64 × 3x2y2 − 4xy × 5xy simplify

√64 × 3x2y2 − 4xy × 5xy simplify

$$\\\sqrt{64}*3x^2y^2-4xy*5xy\\\\ =8*3x^2y^2-4xy*5xy\\\\ =24x^2y^2-20x^2y^2\\\\ =4x^2y^2\\\\$$

 Melody, you are right !

                        $${\mathtt{4}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,\times\,}}{{\mathtt{y}}}^{{\mathtt{2}}}$$

Thanks from radix !