Question

surds simplify 3√7-2√7-√7​

Answer 1

Answer:

3√7-2√7-√7

√7(3-2-1)

√7.0

=0

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Answer 2

Answer: 3√7 - 2√7 - √7

           = 3√7 - 2√7 = 1√7 = √7

           = √7 - √7

           = 0  (rational no.)                 - Soln.

           * 3√7 - 2√7 - √7 is not a surd as 0 is a rational number

Step-by-step explanation:

=> The number outside the root can be subtracted as the number inside the roots are same.

Example : 3√7 - 2√7 = 3 - 2 = 1√7 = √7; √7 - √7 = 1 - 1 = 0.