this week in precalc 11 I learned about nonpermissible values.

nonpermissible values are numbers that x cant equal because if it does there are no possible solutions.

now the way you find them is by looking at the denominator which could be nx, (x+n)(x-n)

so for the first one x cant equal 0 because the denominator cant equal 0 and 0 multiplied by a number =0. for the second one you have to make sure the denominator doesn’t = 0 so x cant = -n and for the last one its the same thing except x cant equal +n or else it will equal 0.

also there can be more than 1 non permissible values in a equation like  *

so the non permissible values would be 0 and+4