1.) x⁴•x² = x^6
For this problem you just need to add the exponent because they have the same variables and the operation is multiplication, thus you're going to subtract it when the operation is division...
2.) (2a³)(a²) = 2a^5
As you know if the variable don't have a number in it, then it is counted as 1, in this case you just need to multiply the numbers and add the exponent because it is multiplication...
3.) (3ab³)²
(3ab³)(3ab³) = 9a²b^6
Well, this one has a (²) square meaning you need to multiply it by itself...
Hope it helps...
