Question : If $4x–7y=3$ and $2x–y=9$, then the value of $(x–y)$ is:

Question : If $x=\sqrt[3]{28}, y=\sqrt[3]{27}$, then the value of $x+y-\frac{1}{x^{2}+xy+y^{2}}$ is:

Question : If $4 x^2+y^2=40$ and $x y=6$, find the positive value of $2 x+y$.

Question : If x + y = √3 and x – y = √2, the value of 8xy(x² + y²) is:

Question : If the HCF of xy³, x² y, and x³ y⁴ is xy, then their LCM is________.