Author Question: QUADRATICS: Find vertex from factored form without changing the form? (Read 1422 times)


  • Hero Member
  • *****
  • Posts: 705
how do I find the vertex of this without changing the form?

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


  • Full Member
  • ***
  • Posts: 145
1) find the roots:
x= 1.1

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.... :)

Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


  • Hero Member
  • *****
  • Posts: 679
the roots are 1.1 , - 3.2

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


Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

There are more bacteria in your mouth than there are people in the world.

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?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

For a complete list of videos, visit our video library