Question

If one root of the equation x² + ax + 3 = 0 is 1, then its other root is 

A. 3 

B. – 3 

C. 2 

D. – 2

Answer 1

Let the given equation has roots α and β 

α = 1 

Here a = 1, b = a and c = 3 

Sum of the roots 

α + β = – b/a = – a 

product of the roots 

α β = c/a = 3 

1 β = 3 

β = 3