Answer:
So if they meant 
then the answer is:
.
The choice this corresponds to is A.
Step-by-step explanation:
The sum of cubes formula for factoring or expanding:
You have I'm assuming they meant:
.
Compare to 
.
You should see in place of 
you have 
.
You should also see in place of 
you have 
.
Let's check it for fun.
So we are going to use the distributive property.
We are going to distribute all the terms in the first ( ) to all the terms in the second ( ).
+ 
+ 
Combine like terms:
Simplify the grouping of like terms:
0 times anything is 0:
Answer:
A= 109 B= 16 C=86
Step-by-step explanation:
Write an equation for each statement:
:
"The sum of three integers is 211."
a + b + c = 211
:
"The sum of the first an second integers exceeds the third by 39."
a + b = c + 39
a + b - c = 39
:
"The third integer is 23 less than the first."
c = a - 23:
Subtract the 2nd equation from the 1st equation
a + b + c = 211
a + b - c = 39
---------------subtraction eliminates a and b, find c
2c = 172
c = 86:
Find a using the 3rd equation
86 = a - 23
86 + 23 = a
a = 109
:
Find b using the 1st equation
109 + b +86 = 211
b = 211 - 195
b = 16
NO!!! a prime number cannot be a multiple of another number except itself because prime numbers are numbers that are ONLY DIVISIBLE by 1 and ITSELF
