Question : If $r$ = 55, then the value of $r(r^2+3 r+3)$ is:
Option 1: 105000
Option 2: 176615
Option 3: 175616
Option 4: 175615
Correct Answer: 175615
Solution : Given: $r(r^2+3 r+3)$ $= 55(55^2+3 \times 55+3)$ $= 55(3025 + 165 + 3)$ $= 55 × 3193$ $= 175615$ Hence, the correct answer is 175615.
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