Saturday

February 28, 2015

February 28, 2015

Posted by **Jackie** on Monday, March 18, 2013 at 2:04am.

- college algebra -
**Steve**, Monday, March 18, 2013 at 4:32amIf you are confused by formulas, it indicates you don't really understand the concepts. Let's start from scratch.

You know the graph is a parabola, which has a vertex.

Since the coefficient of x^2 is positive, the vertex is at the minimum value of y.

So, left of the vertex y is decreasing, and on the right, it is increasing.

So, where is the vertex?

y = 2x^2 - 12x + 19

= 2(x^2-6x) + 19

= 2(x^2-6x+9) + 19 - 18

= 2(x-3)^2 + 1

So, the vertex is at (3,1)

y decreases for x < 3

y increases for x > 3

- college algebra -
**Jag**, Saturday, March 23, 2013 at 7:50pmVertex is -b/2a

ax^2+by+c=0

or

(x2-x1)/(y2-y1)

**Answer this Question**

**Related Questions**

Algebra - Im having a hard time figuring out this problem: Use the function, y...

increasing decreasing calc - f(x)=x^3=12x-24 f'(x)=3x^2+12=0 3x^2=-12 x^2=-4 ...

Algebra help - f(x)=x^3-4x^2-x+4 How do I find the x-intercept for this? This is...

College Algebra - Why is t= ln(2)/.04 the same as t= 25ln(2)? Please explain it ...

Physics - Can someone please show me step by step how to normalize e^-5x in the ...

algebra - Im having a hard time figuring out this problem: Use the function, y...

algebra - the revenue from selling x units of a product is given by y=-0.0002x^2...

college algebra - Can anyone please help me with this? for the function f(x) =1/...

chem - ok my professor lost me when explaining this material so please bare with...

Pre-Cal - Hi, can someone please solve this step-by-step for me? I really don't ...