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  1. If x * y = (x + 3)2 (y –1), then the value of 5 * 4 is
    1. 192
    2. 182
    3. 180
    4. 172
Correct Option: A

x ★ y = (x + 3)2 (y – 1)
∴  5 ★ 4 = (5 + 3)2 (4 – 1)
= 64 × 3 = 192


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