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 1740 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?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.