Concept: To get the value of any function at any point with respect to some other function, we need to manipulate the given function/ point in such a way that we get the function that is needed. Calculation: Given, f(x+1)=x2−3x+2 =x2−2x−x+2 =x(x−2)−(x−2) =(x−2)(x−1) =(x+1−3)(x+1−2) ∴f(x)=(x−3)(x−2) =x2−3x−2x+6 =x2−5x+6