Question

If the equation x2 - (b + 4)x + 2b + 5 = 0 has equal roots, then the values of 'b' (a) -2 (b) 2 (c) +2 (d) +1​

Answer 1

Answer:

The answer for the above polynomial equation is 1

Answer 2

If the equation x2 - (b + 4)x + 2b + 5 = 0 has equal roots, with zero as a. The factors are (x - a)(x - a) => (x - a)^2

a^2 = 2b + 5
2a = b + 4

Quick visual check gives (b) 2 as the answer meeting both the above equations.