Hi community,
what went wrong here ?
Let's say Z=5 by definition.
Z = 5 | multiply with Z both sides
ZZ = 5Z | -25 both sides
ZZ-25 = 5Z-25 | factorise 5 on the right side (I hope factorise is the right english term)
ZZ-25 = 5x(Z-5) | 3rd binomial formula on the left side
(Z+5)x(Z-5) = 5x(Z-5) | divide by (Z-5)
Z+5 = 5 | -5
Z = 0
But Z = 5 by definition ... can't be 0 too !!!
Leave your comment what went wrong or if you really don't know come back in a week for the solution.
Have a steemy day ...