√64 × 3x2y2 − 4xy × 5xy simplify
$$\\\sqrt{64}*3x^2y^2-4xy*5xy\\\\ =8*3x^2y^2-4xy*5xy\\\\ =24x^2y^2-20x^2y^2\\\\ =4x^2y^2\\\\$$
$${\mathtt{4}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,\times\,}}{{\mathtt{y}}}^{{\mathtt{2}}}$$