±√121 what is the answer
2 answers:
Answer:
±√121 = ±11 (11, -11)
Step-by-step explanation:
1.First, find two equal numbers multiplied by each other to get 121:
This will be 11×11, so the answer for the square root is +11 or -11.
2. Or you can find the square root of a number using this method:
- draw a line splitting two sides from each other.
- then, write the number inside the square root on the left side of the line.
- after that, on the right side, write a number that can be divided by 121 ( it should be a whole number and a prime number).
- write the answer to the division on the left side of the line.
- next, rewrite the two steps above by writing a number that can be divided by the answer of the division.
- stop writing the number when you get to number one on the left and right sides.
- finally, match every two equal number together to make it on the number and multiply them together to get the answer for the square root.
- you can understand it more from the picture below, I also did another example for this method.
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