# Math Help - help with simultaneous equations

1. ## help with simultaneous equations

Having problems with this one - and other questions like it. Any general advice would be better than the answer, although the answer would be good too !

KX^2 +8x + 5 = 0

Find the value of K for which the equation has real routes.

TNXS

Becca.

2. Originally Posted by becca999
Having problems with this one - and other questions like it. Any general advice would be better than the answer, although the answer would be good too !

KX^2 +8x + 5 = 0

Find the value of K for which the equation has real routes.

TNXS

Becca.
The discrimant is non-negative.
Thus,
$64-20k\geq 0$
Thus,
$20k\leq 64$
Thus,
$k\leq 3.2$