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If `x+2` is a factor of `x^2+a x+2b` and `a+b=4`, then (a) `a=1,\ b=3` (b) `a=3,\ b=1` (c) `a=-1,\ b=5` (d) `a=5,\ b=-1`

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RD SHARMA ENGLISH-COORDINATE GEOMETRY-All Questions
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  3. If x+2 is a factor of x^2+a x+2b and a+b=4, then (a) a=1,\ b=3 (b) a=...

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