- #1
Physssics
- 5
- 0
Hi,
I have my AS Maths exam on Monday and so I was looking at some previous papers and I couldn't do this question:
The quadratic equation (k+1)x² + 12x + (k-4) = 0 has real roots
(a) Show that k² - 3k - 40 ≤ 0
I don't even understand where to start so I was hoping you could help me.
Thanks!
I have my AS Maths exam on Monday and so I was looking at some previous papers and I couldn't do this question:
The quadratic equation (k+1)x² + 12x + (k-4) = 0 has real roots
(a) Show that k² - 3k - 40 ≤ 0
I don't even understand where to start so I was hoping you could help me.
Thanks!