Just to be clear, the original expressions are:
A.
and
B.
Is that right?
Simplifying exponential expressions, can you please confirm my solutions are correct?
A.
(3x^4y^5z^7)^5 / (-3x^3yz^4)^7
= -1^5-7x^20-21y^18z^7 = -1^-2x^-1y^18z^7
Solution I arrived at:
y^18z^7/ x
B.
[x^(a+b)]^(a-b) / [x^(a-2b)]^(a+2b)
Solution:
= 1^(3b^2)
Thanks in advance.
Sincerely,
Raymond MacNeil
I would agree with your answer, since I know what you meant to write. However, you should technically write -(y^18)(z^7)/(9x) to be completely unambiguous. Don't write so that people can understand you: write so they can't misunderstand you!
I guess I get baffled here because I am not entirely sure what to do when you have positive and negative exponents. Do you turn it into a complex fraction? I substituted numbers for the the unknowns and it seems to work out that the correct solution would be x^(3b^2). I acknowledge previously I had a "1" instead of maintaining the variable "x". Though perhaps I am still doing something wrong. Do you mind showing me the entire process because I have never encountered this type of expression before and the course has not supplied any examples demonstrating how to carry this out either.
Thanks in advance.
Sincerely,
Raymond.