Question

Can someone help m solve this...

Answer 1

@Mertsj

Answer 2

We have to be able to read the statement like this: x=3 if and only if x^2=9 which means x=3 if x^2=9 and that is true but then we have to turn it around: x^2=9 if and only if x = 3. That, of course, is not true. Because x might be -3.

Answer 3

So try that with the others and see which one works.

Answer 4

@Mertsj ok

Answer 5

@Mertsj so would it be the first one?

Answer 6

Did I not just go through the first one in detail and explain why it wouldn't work?

Answer 7

@Mertsj ohh sry, im really bad at this

Answer 8

@Mertsj i think its the last one, am i correct? because 19 is the only solution for the equation

Answer 9

Yes. Good for you

Answer 10

@Mertsj thanks

Answer 11

yw