Q. Simplify the expression completely.249+−64+−36Answer:
Positive Number Simplification: Simplify the square root of a positive number.We have 249, which is 2 times the square root of 49. The square root of 49 is 7.So, 249=2×7=14.
Negative Number Simplification: Simplify the square root of a negative number.We have −64, which involves the square root of a negative number. The square root of a negative number is an imaginary number. We can write −64 as 64×−1, which is 8i, where i is the imaginary unit.
Another Negative Number Simplification: Simplify another square root of a negative number. Similarly, −36 can be written as 36×−1, which is 6i.
Combining Results: Combine the results from the previous steps.Now we combine the results from steps 1, 2, and 3.14 (from step 1) + 8i (from step 2) + 6i (from step 3) = 14+(8i+6i)=14+14i.