What is the multiplication rule of indices?
The multiplication rule is that when multiplying terms with indices, you add the indices up. In an example, if we had to simplify 3y2 x 4y3 then we would first multiply the coefficients together (the numbers before the letters), 3x4 = 12. The next thing we do is multiply the y's, we have y2 x y3, which means that our indices are going to come to 2+3 = 5. Therefore the answer is 12y5. Think of it this way: 2 x 2 is equal to 22. 22 x 2 is equal to 2 x 2 x 2, which is also equal to 23. It is the exact same principle here, but we are using letters instead of numbers!
