Does this function cross the x-axis once?

0 ⤊

Does this function cross the x-axis once?

The function below crosses the x-axis once

y = x2 - 7x + 7

true or false

all help is appreciated :)

2007-11-29 13:00:31 · 4 answers · asked by dumbhoe 1 in Science & Mathematics ➔ Mathematics

4 answers

x^2-7x+7=0
x=((7+-sqrt(49-28))/2 so it crosses the x axis twice

2007-11-29 13:05:08 · answer #1 · answered by santmann2002 7 · 0⤊ 0⤋

Hola...

well, if u meant x^2 it is a parabola...concave up...

Complete the square

x^2-7x+7
I'm sure u know how to do this:-)...your smart!

Vertex would be (h, k)...

Basically, NO!...It crosses 2 times

:-)

2007-11-29 13:09:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋

It crosses twice

2007-11-29 13:09:08 · answer #3 · answered by bmlarri 1 · 0⤊ 0⤋

False. [assuming you meant x^2]

2007-11-29 13:03:58 · answer #4 · answered by Anonymous · 0⤊ 0⤋