There should be an equal sign, right If it is F+X+ 1 = X? 0? 5-3x+2 method 1 method of substitution Let T = X+ 1, then X = T- 1 F ﹙ T ﹚ = X? 0? 5-3x+2=﹙t- 1﹚？ 0? 5-3﹙t- 1﹚+2=t？ 0? 5-5t+6 means f ﹙ x ﹚ = x? 0? 5-5x+6 method 2 patchwork method f+x+ 1 = x? 0? 5-3x+2=﹙x+ 1﹚？ 0? 5-5 ﹙ x+ 1 ﹚+6 is f ﹙ x ﹚ = x? 0? 5-5x+6