1 00:00:00,124 --> 00:00:06,850 Simply 4a squared b and this whole quantity is being raised to the third power 2 00:00:06,850 --> 00:00:10,565 Now here we'll just use the property if we have the product of things, 3 00:00:10,565 --> 00:00:15,163 let's say I have a times b and I'm raising that to some power n 4 00:00:15,163 --> 00:00:20,735 this is just going to be equal to a to the n times b to the n. 5 00:00:20,735 --> 00:00:27,098 And to realize why that happens, let's just try it out with a simple example. 6 00:00:27,098 --> 00:00:32,903 If I have a times b to the third power, what is that going to be equal to? 7 00:00:32,903 --> 00:00:37,222 That is going to be equal to a times be (that's to the first power) 8 00:00:37,222 --> 00:00:40,287 and then times a times b (and that's to the second power) 9 00:00:40,287 --> 00:00:43,491 times a times b (that's to the third power). 10 00:00:43,491 --> 00:00:47,903 We're literally taking this expression and multiplying it three times. 11 00:00:47,903 --> 00:00:51,897 Now, we can just swap these around, because of the communicative 12 00:00:51,897 --> 00:00:55,426 and associative properties of multiplication. 13 00:00:55,426 --> 00:00:58,723 So if we just swap these around and change the order in which we're multiplying, 14 00:00:58,723 --> 00:01:04,435 we can write this as a times a times a times b times b times b. 15 00:01:04,435 --> 00:01:06,572 We have three a's here and three b's. 16 00:01:06,572 --> 00:01:09,358 So this right here is going to be equal to a to the third, 17 00:01:09,358 --> 00:01:12,841 and this right over here is going to be equal to be to the third. 18 00:01:12,841 --> 00:01:15,627 So we have a to the third and b to the third, and so it worked. 19 00:01:15,627 --> 00:01:19,110 Hopefully this gives you a sense of why this property holds. 20 00:01:19,110 --> 00:01:21,293 Now let's apply it to the actual problem! 21 00:01:21,293 --> 00:01:25,148 So we have 4 a squared b to the third power. 22 00:01:25,148 --> 00:01:29,513 That means that each of the components in the product are going to b raised 23 00:01:29,513 --> 00:01:34,714 to the third power so that means that we have 4 to the third power times 24 00:01:34,714 --> 00:01:40,705 a squared to the third power times b to the third power 25 00:01:40,705 --> 00:01:42,980 let me color code, this third power 26 00:01:42,980 --> 00:01:46,928 here in mangenta, that's this third power over here 27 00:01:46,928 --> 00:01:49,761 I'm just raising it, sort of taking the product first and then 28 00:01:49,761 --> 00:01:51,200 raising that to the third power 29 00:01:51,200 --> 00:01:54,869 I can take each of the terms in the product eah of the numbers 30 00:01:54,869 --> 00:01:57,470 in the product and raised those to third power first 31 00:01:57,470 --> 00:02:00,721 and then take the product. So that's what we are doing 32 00:02:00,721 --> 00:02:02,392 Let's try to simplify this 33 00:02:02,392 --> 00:02:05,504 What is four, what is four to the third power 34 00:02:05,504 --> 00:02:08,290 Four to the first is four, four to the second is 16 35 00:02:08,290 --> 00:02:11,355 and we want to multiply 16 times 4, 36 00:02:11,355 --> 00:02:15,303 So 4 to the third power is just 4 times 4 times 4 is 64. 37 00:02:15,303 --> 00:02:19,714 and then we have a squared and we are raising that 38 00:02:19,714 --> 00:02:22,826 to the third power. We know from the product property of 39 00:02:22,826 --> 00:02:26,820 the exponents that's going to be a to the 2 times 3 power 40 00:02:26,820 --> 00:02:30,906 or a to the sixth power, so this is a to the sixth power 41 00:02:30,906 --> 00:02:35,179 we got six from 2 times three and then finaly 42 00:02:35,179 --> 00:02:39,591 we juste have b to the third power, let me do that in a different colour 43 00:02:39,591 --> 00:02:43,027 we just have b to the third power and I'll juste write it over here 44 00:02:43,027 --> 00:02:47,300 So we simplify this expression to 64 a to the sixth 45 00:02:47,300 --> 99:59:59,999 b to the third power.