1.

If the two equations a a_(1)x^(2)+b_(1)x +c_(1)=0 and a_(2)x^(2)+b_(2)x+c_(2)=0 have a common root, then the value of (a_(1)b_(2)-a_(2)b_(1)) (b_(1)c_(2)-b_(2)c_(1)) is

Answer»

`-(a_(1)c_(2)-a_(2)c_(1))^(2)`
`(a_(1)a_(2)-c_(1)c_(2))^(2)`
`(a_(1)c_(1)-a_(2)c_(2))^(2)`
`(a_(1)c_(2)-a_(2)c_(1))^(2)`

ANSWER :d


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