For example -3x^2+5x+8 According to my teacher the first time should be positive. Why?

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For example -3x^2+5x+8 According to my teacher the first time should be positive. Why?

a friend is angry for telling a secret now he blocked me from social media site now, what can i do

% of 450+46% of 285=257.1

Still wear nappies and have a pacifier( dummy) I don’t know what to do I’m 14 years old by the way

Can I get answer know

I can't remember how to do this. I don't think I am doing this problem right.

Mathematics class 6 questions

I think the question is false. Knowing that a critical point MUST be a point where the derivative is 0 or undefined, then of it can be a local min/local max. Please correct me if im wrong

I don't know how to get this answer.

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i need the answer asap

whatevs this is a watse of time please just give me the answer. p p p p p p p p p p p p p p p p p

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