Maths Watch

Mokshyada
Badges: 2
Rep:
?
#1
Report Thread starter 1 week ago
#1
Given that k is a positive constant sketch the graph of
y=(x+k)(x-2k)
0
reply
Eimmanuel
  • Community Assistant
Badges: 12
Rep:
?
#2
Report 1 week ago
#2
(Original post by Mokshyada)
Given that k is a positive constant sketch the graph of
y=(x+k)(x-2k)
You should be able to find the roots and the y-intercept.

The minimum or maximum points can be found by:
(1) first find the midpoint between the 2 roots
(2) use the value of x in the midpoint and substitute it back to the equation to find the y value.

When you expand the brackets, you should be able to see if the quadratic curve is a min or max curve.
0
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 Derby
    Postgraduate and Professional Open Evening - Derby Campus Postgraduate
    Tue, 22 Jan '19
  • University of the West of England, Bristol
    Undergraduate Open Afternoon - Frenchay Campus Undergraduate
    Wed, 23 Jan '19
  • University of East London
    Postgraduate Open Evening Postgraduate
    Wed, 23 Jan '19

Brexit: Given the chance now, would you vote leave or remain?

Remain (1525)
79.26%
Leave (399)
20.74%

Watched Threads

View All
Latest
My Feed