Marco says (x5)(x2) is equivalent to x7. Jaime says it’s equivalent to x10. Who is correct?



Answer
A
Marco, because (xa)(xb)= xa+b.

B
Jaime, because (xa)(xb) = xa•b.

C
Neither is correct, because (xa)(xb) = xa–b.

D
Neither is correct, because you cannot simplify (xa)(xb)