Answer:
3rd choice
Step-by-step explanation:
In division for variables with same base, you do subtract top exponent minus bottom exponent. She did that correctly since -3-(-1)=-3+1=-2 and -2-1=-3.
The problem said m=-2 and n=4 and she replace m with (-2) and n with (4). She did this correctly.
You can multiply base numbers unless the exponents are the same 4 doesn't have the exponent -2 on it so you can't do (4(-2))^(-2)
The error is the 3rd option.
Commutative Property of Addition
You would get 89/21 and then for a mixed number 4& 5/21
Answer:B
Step-by-step explanation:
Just did it on math nation
M-N is 
Option B is correct.
Step-by-step explanation:
If
and
then find M-N
We need to subtract N from M
We will combine like terms (terms having same variable and exponent) and then solve them:


So, M-N is 
Option B is correct.
Keywords: Solving Polynomials
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