Practice problem
Simplify the fraction 64z9x740z4x2\frac{64z^9x^7}{40z^4x^2}40z4x264z9x7 if xxx and zzz are nonzero.
8z9x75z4x2\frac{8z^9x^7}{5z^4x^2}5z4x28z9x7
8z5x55\frac{8z^5x^5}{5}58z5x5
8z13x95\frac{8z^13x^9}{5}58z13x9
None of the above
Type a concept, like “slope” or “photosynthesis”.