Posted 07 December 2008 - 06:46 PM

1st post here so go easy on me

I'm really stuck with 4 questions. Any help would be great thanks

#1) Factorise fully:

+

- 4x - 3

#2) For what value of "a" does the equation

+ 20x + 40 = 0

have equal roots?

#3) Show that the roots of the equation

(k-2)

- (3k-2)x + 2k = 0

are real?

#4)

Posted 07 December 2008 - 11:21 PM

ahh didnt' notice this one, I replyed to your other post XD

Posted 06 April 2009 - 01:09 PM

1) Use synthetic division with a factor of 2.

2) Substitute a = a, b = 20 and c = 40 into

.

3) Same thing, except use the bracketed terms in

.

4) Turn it into

.

Hope this helps!