Answer:

Explanation:
All the other expressions can be factorized. Let's see why:
1) 
This is the sum of the cubes, and this can be factorized as follows:

In this case, a=m and b=1, so we can factorize as

2) 
This is the difference between two cubes, and this can be factorized as follows:

In this case, a=m and b=1, so we can factorize as

3) 
This is the difference between two square numbers, and it can be factorized as follows

In this case, a=m and b=1, so we can factorize as

Answer:
Which is equal to 18.
Step-by-step explanation:
7(3) - 15/(5). 7 x 3 is equal to 21, 15/5 is equal to 3. you are now left with 21- 3,
8x-2=-9+7x
Add 2 to both sides
8x=-7+7x
Subtract 7x from both sides
x=-7
Answer:
2/3x+4
Step-by-step explanation: