Question

find the value of k for which the roots of quadratic equation kx2-10x +5=0 are equal.

find the value of p for which roots of quadratic equation 3x2 -px+3=0 are real where p>0.

a train travels 360 km at uniform speed.if speed had been 5km/h more, it would have taken 1 hr less for the same journey.find the speed of the train.

Answer 1

1) b² - 4ac = 0
100- 20k= 0
k= 5 ans.
2) p= 6 ans.
3) let speed = xkm/ h
time = y
360 = xy
( x+5)(y-1) = 360
so, y= 9 hr.
hence , speed = 40 km/ h.
pls ,mark as brainliest.

Answer 2

Answer:

40 km/ h.

Step-by-step explanation:

1) b² - 4ac = 0

100- 20k= 0

k= 5 ans.

2) p= 6 ans.

3) let speed = xkm/ h

time = y

360 = xy

( x+5)(y-1) = 360

so, y= 9 hr.

hence , speed = 40 km/ h.

pls ,mark as brainliest.