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x' = x + 3 - 4 --> x' = x - 1 --> x = x' + 1
y' = y - 2 + 3 --> y' = y + 1 --> y = y' - 1
y= x^2 + 1 --> (y' -1) = (x' + 1)^2 + 1
atau
y - 1 = x^2 + 2x + 1 + 1
y - 1 = x^2 + 2x + 2
y = x^2 + 2x + 3