Question

I need help with this. There are 3 other options. 2 only. 1 only. Or none of the above.

Answer 1

Given: An expression-

`√(36)+√(49)-√(16)`

Required: To simplify the expression and determine the correct solution.

Explanation: The square root of a number can be simplified by factorizing the term inside the square root into the product of its factors as follows-

`√(6*6)+√(7*7)-√(4*4)`

Now, we take out a number outside the square root from the pairs of numbers to give the following-

`6+7-4=9`

Also, we know that the square of 9 is 81. Hence,

`√(81)=9`

Hence, the given expression is equal to 9 and the square root of 81.

Final Answer: Option A (1 and 4) is correct.