Q21.
The cost of a chocolate is Rs (2x + y). Tina bought 2(x + 2y) chocolates.
Find the total amount paid by her in terms of x.
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Answer:
10xy + 4x² + 4y²
Step-by-step explanation:
Cost of chocolate = Rs (2x+y)
Number of chocolates Tina buyed = 2(x+2y)
Total Cost = (2x+y) x 2(x+2y)
= (2x+y) x (2x+4y)
= (2x+y) x 2x + (2x+y) x 4y
= 4x² + 2xy + 8xy + 4y²
= 10xy + 4x² + 4y²
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