C1 Maths Help Watch

shoakuma
Badges: 0
Rep:
?
#1
Report Thread starter 4 years ago
#1
On my homework there are some questions I dont understand

What does the value of this discriminant (-4) tell you about the solutions of the equation x^2+4x + 5?

And what does show the coordinates of any points where the graph cuts the coordinate axis mean?
0
quote
reply
rayquaza17
Badges: 17
Rep:
?
#2
Report 4 years ago
#2
Have you learned about the discriminant?

If discriminant > 0, there are two real roots.
If discriminant < 0, there are no real roots.
If discriminant = 0, there is 1 root.


It means that when you do your sketch, you will need to make it clear where where your curve crosses the axes you draw. So if it crosses at (1,0), you would either write (1,0) next to this point, or indicate 1 on the x-axis.
0
quote
reply
shoakuma
Badges: 0
Rep:
?
#3
Report Thread starter 4 years ago
#3
I have learned about the discriminant. I just don't understand what the question is asking because of how it is worded. I forgot to put that =0 on the end the equation, the equation is x^2+4x + 5=0. So would the discriminant be =0 like in the equation or <0 as I worked the discriminant out to be -4?
0
quote
reply
rayquaza17
Badges: 17
Rep:
?
#4
Report 4 years ago
#4
(Original post by shoakuma)
I have learned about the discriminant. I just don't understand what the question is asking because of how it is worded. I forgot to put that =0 on the end the equation, the equation is x^2+4x + 5=0. So would the discriminant be =0 like in the equation or <0 as I worked the discriminant out to be -4?
-4<0 so it's <0
0
quote
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of East Anglia
    UEA Mini Open Day Undergraduate
    Fri, 4 Jan '19
  • University of Lincoln
    Mini Open Day at the Brayford Campus Undergraduate
    Mon, 7 Jan '19
  • Bournemouth University
    Undergraduate Mini Open Day Undergraduate
    Wed, 9 Jan '19

Did you get less than your required grades and still get into university?

Yes (49)
29.88%
No - I got the required grades (95)
57.93%
No - I missed the required grades and didn't get in (20)
12.2%

Watched Threads

View All