✔ 最佳答案
Okay so first you have to distribute the 48 to the (-1/8). you will then get -6. then, you must distribute the -6 to the (-1/2). you will get 3. Its positive 3 because the two negatives from -6 and -1/2 cancel when multiplied.
on the second one it's pretty much the same but with different numbers of course. when you multiply 3/5 and -8/7 you will get -24/35. i think that's a division sign next to the last closing parenthesis so then you have to divide -24/35 by 72/1. you may do this or you can just make it -24/35 * 1/72 which i find easier. you will then get -24/2520, which reduces to -1/105