Question

with graph y=x2+16 solve x2-16=0

Answer 1

I am not sure what the equation y=x^2+16 has anytihng to do with solving for x^2-16...

solving for x^2-16=0 however canbe done fairly simply using algebra

x^2-16=0
First add 16 to both sides
x^2=16
then take the squareroot of both sides
\[x=\pm4\]

and that's your solution.

Let me know if I misread the question.

Answer 2

thanks, i not sure what relevance the graph had ?

Answer 3

I'm not exactly sure either.