For what values of \( m \) and \( n \), the expression \( 2 x^{2} \) \( -(m+n) x+2 n \) is exact...
For what values of \( m \) and \( n \), the expression \( 2 x^{2} \) \( -(m+n) x+2 n \) is exactly divisible by \( (x-1) \) and \( (x-2) \) ?
(a) \( m=5, n=2 \)
(b) \( m=3, n=4 \)
(c) \( m=4, n=2 \)
(d) \( m=2, n=4 \)
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