Hi everyone, I am new in this forum. Anyway I have been struggling with an inequality question in my homework, unfortunately due in tomarrow.
Find the value of k for the following equation which has 2 real roots
Kx^2 + kx + 2 = 0
Now I have found that: b^2 -4ac
k^2 - 4*k*2> 0
K^2 -8k > 0
I do not understand what to do after this stage because it is not possible to expand the brackets or square root the 8
Hello, James!
Welcome aboard!
Factor: .Find the value of for which the following equation
has two real roots: .
Now I have found that: .
So we have: .
It says: The product of two numbers is positive.
When does this happen?
. . It happens in two ways . . .
[1] Both factors are positive: .
[2] Both factors are negative: .
Therefore, the equation has two real roots for: .