Quadratics stretching and vertex form help?

Author Question: Quadratics stretching and vertex form help? (Read 1558 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?

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?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.