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-9

is it like all real numbers, or can you please explain?

yes

it still does not make sense, x has to be > 0

the real numer has negive

@jim_thompson5910 can you help me with these two problems?

by default, all polynomials have a domain of the set of all real numbers

Thank you! Now my answers are:
1. x=all + real numbers
2. x cannot=+ or - 4, and -2
is that right?

the first one is correct, but the second is not

hint: x^2 - 8x + 16 factors to (x-4)(x-4)

so x cannot equal 4, or -2 ?

how are you getting -2?

bingo, the domain is the set of all real numbers but x cannot equal 4

Okay thank you! :)

you're welcome