Question

Answer 1

`a)P(-1)=2`

`=>m.(-1)-3=2`

`=>-m=2+3`

`=>-m=5`

`=>m=-5`

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`b)` Thay `x=-1` vào `Q(x)=0`. Có:

     `-2.(-1)^2+m.(-1)-7m+3=0`

`=>-2.1-m-7m+3=0`

`=>-8m=-1`

`=>m=1/8`