Quadratics stretching and vertex form help?

Author Question: Quadratics stretching and vertex form help? (Read 1561 times)

federox

Sr. Member
Posts: 308

on: Jun 18, 2013

Hi, so the questions tells me to...
Evaluate the following function at 3,-3,0, and z
D(r)= -(r-2)^2+8
I got the correct answers for the first three numbers but got "z" incorrect. Can someone please show me how to get the correct answer?

This is what I did...
D(z)= -(z-2)^2+8
= -z^2+4+8
= -z^2+12

curlz

Hero Member
Posts: 538

Reply #1 on: Jun 18, 2013

-(r-2)^2+8=
-[r^2-4r+4]+8=
-r^2+4r+4

Need homework help now?

Ask unlimited questions for free

Ask a Question

« previous next »

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.