Answer:
10. 121
12. 48
Step-by-step explanation:
10.
So, when it comes to squares, you always multiply the number by itself (unless it is in parenthesis, but that's another question for another time).
In this case, you have a -11 behind the square.
Pro Tip: Any time there is a single number being squared, it will ALWAYS be positive-no matter if it is negative or positive (e.g., 5x5=25 and -5 x -5=25)
So, you would multiply the -11 by itself, or -11 x -11, which equals 121.
Pro Tip: Whenever you are multiplying any double digit number with 11, you separate the two numbers in the double digit, add them together and put that sum in between the two numbers (e.g., 12 x 11 = 1(1+2)2 = 132, or 16 x 11 = 1 (1+6) 6 = 176.
12.
With this, you have to be a little more precise.
Let's look at the first parenthesis.
When you are doing cubes, you multiply the same number 3 times against itself:
In this case, -2 x -2 x -2 = -8.
(If you are wondering why it's negative, think about this: when a negative number is squared, it becomes positive--like -5 x -5 = 25-- but if you multiply a positive number by a negative one, you get a NEGATIVE number again-- -5 x -5 = 25 x -5 = -125)
Now, looking at the second parenthesis, there isn't anything attached to it, so you just multiply with it.
So, -8 x -6 = 48.
Hope this helps! If you need further clarification, just ask down in the comments. If you feel I did not answer clearly, feel free to tell me, and I will get back to you as soon as possible.
