C. 80 / 80
ExplanationStep 1: For x² the term is 5C2·2³·x². Step 2: Coefficient = 10×8 = 80. Step 3: Carefully track the power of the constant term.
Step 1: general term में x² के लिए 5C2·2³·x² होगा। Step 2: coefficient = 10×8 = 80। Step 3: constant term की power को ध्यान से रखें।
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