Question

Adding and Subtracting Rational Expressions? Help?

Answer 1

1.Two fellow students, Theo and Paula, have added two rational expressions. They ended up with different answers, so they have asked you to check their work. Please explain to them any errors that you find.

Answer 2

do you know what "cross cancelation " is?

Answer 3

Yes! But sadly I don't know how to do anything with these stupid Rational expressions. Can you explain?

Answer 4

for Theo, at line 3, he can't multiple the numerator by (x+2) at the first term because its denominator has (x+2) already. This is the fault.

Answer 5

for Paula, the previous line of the last line is totally wrong. We can't cancel on that way.