Question

Simplify. start fraction 5 x cubed over 7 x cubed plus x superscript 4 baseline end fraction

Answer 1

5/7 + x

Answer 2

can x be 0 or -7

Answer 3

No, because the original expression has x raised to an odd power (x^3) in the denominator. Division by 0 or negative values in this case would result in an undefined expression.