Please help me with graphing these quadratics if you can.

Please show and explain all steps so I can add them to my notes and understand them better, thank you for your help. Identify the vertex, axis of symmetry, domain, range, and x- and y-intercepts for the following quadratic functions. Then graph each function:

f(x) = -2(x+1)^2 + 8

f(x) = 2x + 4x - 5

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Northwest · M

You're back trying to get people to do your homework? You really need to either try to put the effort into learning it, or find some other course to take.

MightyLion · 18-21, M

Like I've said before these are for my notes, not homework. Homework is much more than just two questions. Even if I wanted to take a different class this one is a requirement. @Northwest

Northwest · M

@MightyLion If it's a requirement, then you need to know the stuff, because it's a requirement.

MightyLion · 18-21, M

okay @Northwest

questionWeaver

Those are easy

Why are you not doing them?

They can be done in your head in less time than it took to enter the question

SomeMichGuy · M

The second isn't a quadratic, by simple inspection.

You should know the domain; that's dead easy.

Use your knowledge of the first and second derivatives...

But you know this, because this is the first semester/quarter of calc.

MasterofNone · 26-30, M

I will but you have to fix the second question.

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MasterofNone · 26-30, M

@MightyLion Cool so that means that the second question is wrong. You have to ask your school about that. Because the second question in its current state is not even quadratic.

What part do you need help with?

I can give some hints. Quadratic equation form parabola. If x has negative coefficient it will be downward and if x has positive coefficient it will be upward parabola.

In the first question it is downward. Vertex is when after you make the equation in the form y - b = k(x - a)^2 whatever is (a,b) is the vertex. So in first question if you put x = -1 and f(x) = 8 that's what'll happen hence (-1,8) is the vertex where y = f(x). Can you go further yourself?

akindheart · 61-69, F

@MasterofNone ok i am real impressed by you!!

MasterofNone · 26-30, M

@akindheart Thanks!

Neoerectus · M

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