Question

Which step in this proof contains a flaw?
http://prntscr.com/bcuo70


A.step 3 (incorrect multiplicative inverse)


B.step 4 (subtracted wrong expression)


C.step 5 (factored incorrectly)


D.step 6 (factored difference of two squares incorrectly)

Answer 1

Step 6

Answer 2

@jim_thompson5910

Answer 3

I'll let @zzr0ck3r answer

Answer 4

\(a^6\dfrac{a^4}{a^5}=aa^4=a^5\)

Answer 5

Are you talking about step 2? @zzr0ck3r