QUADRATICS: Find vertex from factored form without changing the form?

« previous next »

Author Question: QUADRATICS: Find vertex from factored form without changing the form? (Read 1748 times)

camila

Hero Member
Posts: 705

on: Jun 17, 2013

how do I find the vertex of this without changing the form?

f(x)= -0.7(1.1-x)(3.2+x)

Jones

Full Member
Posts: 145

Reply #1 on: Jun 17, 2013

1) find the roots:
x= 1.1
x=-3.2

The axis of symmetry is x= (1.1 - 3.2) /2= -1.05
So the x coordinate of the vertex is -1.05

Sub x= -2.1 into f(x), and you'll get the y coordinate of the vertex.

So the vertex is (-1.05, f(-1.05) )

I think you can continue from there....

Need homework help now?

Ask unlimited questions for free

Ask a Question

Hawke

Hero Member
Posts: 679

Reply #2 on: Jun 18, 2013

the roots are 1.1 , - 3.2

so the vertex must be x = [1.1 + (-3.2)] / 2 = - 1.05 ( in the middle)

« previous next »

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.