Rohan’s mother gave him ₹ 3xy2 and his father gave him ₹ 5(xy2 + 2). Out of this total money he spent ₹ (10 – 3xy2) on his birthday party. How much money is left with him?
Money give by Rohan’s mother = ₹ 3xy2
Money given by his father = ₹ 5(xy2 + 2)
Total money given to him = ₹ 3xy2 + ₹ 5 (xy2 + 2)
= ₹ [3xy2 + 5(xy2 + 2)]
= ₹ (3xy2 + 5xy2 + 10)
= ₹ (8xy2 + 10).
Money spent by him = ₹ (10 – 3xy)2
Money left with him = ₹ (8xy2 + 10) – ₹ (10 – 3xy2)
= ₹ (8xy2 + 10 – 10 + 3x2y)
= ₹ (11xy2)
Hence, the required money = ₹ 11xy2