Wednesday

July 30, 2014

July 30, 2014

Posted by **JaneLee** on Tuesday, November 27, 2007 at 8:06pm.

1. Does the graph of y = x – 3x2 + 5 have a maximum or minimum?

2. What is the vertex of the graph of y = -2(x - 3)2 + 4?

3. Does the graph of y = -2(x - 3)2+ 4 open up or down?

My answers: 1. I cannot answer. This is the one I need help with because I don't know how to tell if it has a maximum or minimum. It wasn't in my notes. 2. 1 3. it opens up.

Could someone check 2. &3 and help me with 1? Thanks

- Algebra II repost- please check -
**bobpursley**, Tuesday, November 27, 2007 at 8:53pm2 and three are wrong. On three, what happens to y as x gets large? On two, the axis of symettry is x=3. What is y when x is three?

1. factor it.

y= -3 (x^2 -1/3 x + ?) + 5+?

now, the question mark is what it takes to make a perfect square, 1/2 of 1/3 squared, or 1/36)

y= -3(x-1/6)^2 + 5 1/36

Now, it opens downward, so it has a maximum.

later on, in calculus, there are other methods to determine max/min.

**Related Questions**

Algebra - I posted this earlier but it didn't get answered. So I'm posting it ...

algebra - Can someone please explain What polynomial has a graph that passes ...

Algebra - I posted this last night but it didn't get answered. So I'm posting it...

READ THIS! - Please answer my question that I posted at 6:10 quickly because I ...

Algebra II - Does the graph of y = x – 3x2 + 5 have a maximum or minimum? What ...

Math help please check - Add or Subtract for #3-4 3. (2x2 + 6x + 1) + (–7x2 + ...

9th grade Algebra - The question that Mr. Kirk helped me with a little while ago...

drwl / bobpursley please check - I had posted three questions at 1:48pm, 2:40pm ...

Algebra 1 REPOST - Please Help! - I have been trying to figure this out for a ...

DrBob222 help me!! - Please I posted a chemistry question but I havent gotten ...