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Helpjebal
 one year ago
h(x) =  3x2 + 2x + 12
answer: all real numbers
How did they get this answer and what does it mean to be all real numbers?
Helpjebal
 one year ago
h(x) =  3x2 + 2x + 12 answer: all real numbers How did they get this answer and what does it mean to be all real numbers?

This Question is Closed

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.3Do you mean the domain?

BloomLocke367
 one year ago
Best ResponseYou've already chosen the best response.0What were they looking for?

helpjebal
 one year ago
Best ResponseYou've already chosen the best response.1yes it is a lesson on domain of a function

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.3The domain is all real numbers, simply speaking, because you can plug any real number for x into the equation h(x), and get a valid output.

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.3Any polynomial, by defnition, will have a domain of "all real numbers".

helpjebal
 one year ago
Best ResponseYou've already chosen the best response.1so just because it's a polynomial, we know right off the bat that the domain will be "all real numbers" which is 0 and any positive whole number?

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.3Think about it logically. You have whole number powers of x, with some coefficients in front of them, (+ some number at the end sometimes). No matter what real number you put in for x, you get a real number back. there is just simply no reason for the output to be imaginary if you plug in a real number.

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.3You can make an exercise, perhaps.... Make up a polynomial, and plug in some real numbers into the polynomial. You will always see that your output is going to be a real number.

helpjebal
 one year ago
Best ResponseYou've already chosen the best response.1thank you! just tried that exercise and it totally worked. Thanks again!

SolomonZelman
 one year ago
Best ResponseYou've already chosen the best response.3You are welcome!
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