Question

If a and b are the real roots of the equation x² – kx + c = 0, then the distance between the points (a, 0) and (b, 0) is …..

(a) √(k² - 4c)

(b) √(4k² - c)

(c) √(4c - k²)

(d) √(k - 8c)

Answer 1

(a) √(k² - 4c)

a + b = k, ab = c

Distance between (a,0) and (b,0) is