1.

7+35) (7-3/5) का वर्गमूल है।

Answer»

(7 + 3root(5)) (7 - 3root(5))

Using(a + b)(a - b) = a^2 - b^2

= (7)^2 - (3root(5))^2

= 49 - 9*5

= 49 - 45

= 4



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