The phrase "a positive and optimistic" is correct and usable in written English.
It can be used to describe a person, attitude, or outlook that is hopeful and encouraging.
Example: "Her approach to challenges is always a positive and optimistic one, inspiring those around her."
Alternatives: "an upbeat and hopeful" or "a cheerful and encouraging".
The pro-EU campaign has said it will paint a positive and optimistic picture of the arguments in favour of Britain's EU membership.
Asked about the leaked note at a press conference in Brussels on Friday, Cameron insisted he was adopting a positive and optimistic vision of Britain's EU membership.
ACRI, which is led by former foreign minister Bob Carr, aims to promote "a positive and optimistic view of Australia-China relations".
Maintain a positive and optimistic outlook.
Unlike Rashid's previous books, Pakistan on the Brink depicts a positive and optimistic image of the Taliban.
Reagan was a positive and optimistic statesman who heralded the U.S. as the "shining city upon a hill".
Above all, positive and optimistic people lead themselves by constantly finding encouragement within their soul.
There are data suggesting that the repressive coping style, consisting of a constant presentation of a highly positive and optimistic self-image, may be psychologically maladaptive [ 51].
In her NetFamilyNews commentary on the study, Anne Collier (who is my co-director at ConnectSafely.org) has a more positive and optimistic view of kids use of media, pointing out that "a growing body of research shows that the youth-media story is actually more about sharing, playing with, and producing media, individually and collectively, than consuming it".
She is now well placed to win and replace the absurd gloom in some quarters with a positive, confident and optimistic approach, not just to Europe, but to government all round".
The last is a big worry for the government, as hundreds of thousands of foreign fans, of all hues and colours, arrive in Germany.The coalition government of Angela Merkel is hoping that the tournament will let Germany show itself in a more positive and optimistic light.
