okoji2136
Aug 1, 2009, 08:22 PM
can u help me solve this? Xsqurd minus 5x minus 6
Unknown008
Aug 2, 2009, 08:28 AM
x^2-5x-6
You cannot solve this. There isn't any equal sign. That's an expression.
What you can do here is factorise;
x^2-5x-6 = (x+1)(x-6)
You can see it from here:
x^2-5x-6 = x^2 +x-6x-6=x(x+1)-6(x+1)=(x+1)(x-6)
If it was : x^2-5x-6 = 0, then, solving will be:
x^2-5x-6 =0
(x+1)(x-6)=0
x+1 = 0 or x-6=0
Then;
x = -1 or x=6