If f(x+1)=x^(2)-3x+2 then f(x) is equal ...

If `f(x+1)=x^(2)-3x+2` then `f(x)` is equal to

A

`x^(2) - 5x - 6 `

B

`x^(2) + 5x - 6 `

C

`x^(2) + 5x + 6`

D

`x^(2) - 5x + 6 `

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The correct Answer is:

D

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