Question

one of the roots of the quadratic equation 5x²+kx-7 =0​

Answer 1

Answer:

Given equation

5x

2

−kx+4=0

Now for real roots b

2

−4ac≥0

Hence

k

2

−4(20)≥0

k

2

≥80

k≥4

5

or k≤−4

5