For it to be 1 solution the number is has to be 12. For there to be more than one solution the number has to be greater than 12. For there to be no solutions the number has to be less than 12. We found this by plugging a and c into the discriminate and finding that was 144 and then worked backwards to find b.
What about 11.9?
ReplyDeleteTechnically as Aidan has pointed out, it is anything less then 12 as 11.9 for example works. Otherwise valid strategy and skill was displayed with execution.
ReplyDeleteWouldn't -12 give you one solution too?
ReplyDelete