Question Simplify the expression 8r3−12r2s+6rs2−s3 Evaluate (2r−s)3Use (a−b)3=a3−3a2b+3ab2−b3 to expand the expression (2r)3−3(2r)2s+3×2rs2−s3Solution 8r3−12r2s+6rs2−s3 Show Solution