English: And this residual was nothing but, this d by dx of p x dU by dx plus qx U x minus f of x this was my residual right.
Telugu: మరియు ఈ రెసిడ్యూ(residue) ఏమిటంటే, ఈ d బై dx ఆఫ్ p x dU బై dx ప్లస్ qx U x మైనస్ f ఆఫ్ x ఇది నా రెసిడ్యూ(residue).