Question Simplify the expression x3−9x2a+27xa2−27a3 Evaluate (x−3a)3Use (a−b)3=a3−3a2b+3ab2−b3 to expand the expression x3−3x2×3a+3x(3a)2−(3a)3Solution x3−9x2a+27xa2−27a3 Show Solution