Question

If alpha and alpha +1 are the roots of the equation x^2-7x+a=0 then the value of a is
(1) 6
(2) 9
(3) 10
(4) 12

Answer 1

Answer:

(4) 12

Step-by-step explanation:

α+α+1=-(-7/1)

2α=6

α=3

So, roots are 3,4

3*4=a/1

a=12