One possible solution

[bhumika.k.shah]

What is one possible solution of the quadratic equation (x + a)(x - b) = 0?

(1) a = 4

(2) b = 3

Isnt each statement not sufficient ?

[neoreaves]

I AGREE ,....answer should be D ...what is the source of the question though ?

[bhumika.k.shah]

OA D

Source MGMAT CAT

I meant to say how is each statement sufficient? My pick was E

I AGREE ,....answer should be D ...what is the source of the question though ?

[neoreaves]

we are only asked to find one possible solution ....from the equation there are two

x = -a or x = b

if we can find either one of them then we are done

1) gives us value of a ...so gives us one possible solution so its sufficient

2) similarly gives us one possible solution so sufficient

[bhumika.k.shah]

if a's value is given in statement 1 , we can solve for the first part of the quadratic i.e. (x + a)

But what about the second half ? i.e., (x-b) ?

isn't (x+a)(x-B) a complete quadratic eqn whose answer would depend on a AND b?

we are only asked to find one possible solution ....from the equation there are two

x = -a or x = b

if we can find either one of them then we are done

1) gives us value of a ...so gives us one possible solution so its sufficient

2) similarly gives us one possible solution so sufficient

[pops]

a quadratic has 2 solutions.. we are asked to find any 1 solution.. so if we know a or b we get one solution.. hence both statements individually answers..