How do you solve for x and state restrictions?

restrictions... well, for a fraction, the restrictions will be, that a denominator doesn't become 0, otherwise, the fraction becomes a division by 0, which is an "undefined" value

so.... you have two fractions in the original expression
if we set those denominators to 0, then we can see what "x" is when that expression is 0, and thus, those values of "x", will make the denominator 0, and thus, are not values you'd want in the "domain", because those values make the fraction undefined

so   

the second denominator, gives a +/- i, is just another way to say, the expression will never be 0 no matter what you give "x"

so, the only restriction will then be, from the first denominator, "x" can be anything BUT +/- 2

because if "x" ever becomes 2 or -2, that denominator goes to 0, and the fraction will go poof

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.