SubArea: Polynomials and fractionsLevel: BProject ID: 9000101608Accepted: 1Clonable: 0Easy: 1Expand \(\left (3x + y\right )\left (9x^{2} - 3xy + y^{2}\right )\).\(27x^{3} + y^{3}\)\(27x^{3} - y^{3}\)\((3x + y)^{3}\)\(27x^{3} + 3y^{3}\)