Question

If one of the equation x² + ax + 3 = 0 is 1, then its other root is
(a)3
(b)−3
(c)2
(d)1

Answer 1

SOLUTION :  

Option (a) is correct : 3  

Let α be the one root  of the equation and β be the other root .

Given : x² + ax + 3 = 0 , α = 1

On comparing the given equation with ax² + bx + c = 0  

Here, a = 1 , b = a , c = 3

Product of zeroes = c/a  

α × β = c/a

1×  β = 3/1

β = 3

Hence, the other root of  the equation is β = 3 .

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Answer 2

step by step solution