(7 + 3√5) (7 - 3√5) এর বর্গমূল নিচের কোনটি?
Solution
Correct Answer: Option C
7 + 3√5) (7 - 3√5)
= {72 - (3√5)2}
= (49 - 45)
= 4
∴ (7 + 3√5) (7 - 3√5) এর বর্গমূল = √4 = 2
= {72 - (3√5)2}
= (49 - 45)
= 4
∴ (7 + 3√5) (7 - 3√5) এর বর্গমূল = √4 = 2
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