Question

If the discriminant of 5u2 + bu + 2 = 0 is 41, fi nd all values of b.

Answer 1

for 5u^2 + bu + 2 = 0
a = 5 , b = b and c = 2

b^2 - 4(5)(2) = 41
b^2 = 81
b = ± √81 = ±9

Answer 2

Maths