B. 14 / 14
ExplanationStep 1: Put 7 in place of x. Step 2: 7² - 5×7 = 49 - 35 = 14. Step 3: In a polynomial do square and multiplication carefully.
Step 1: x की जगह 7 रखें। Step 2: 7² - 5×7 = 49 - 35 = 14। Step 3: Polynomial में square और multiplication ध्यान से करें।
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