If you take the square root of any number (or expression) and then square the result again, you will usually obtain the same number (or expression) again. Or more precisely, its absolute value. That is, sometimes you can make the simplifying assumption that you get the same expression, but to be on the safe side, you must consider the possibility that the original expression is negative, in which case the square of the square root is the absolute value of the original expression.
I think you've left out something. Is one of the "x" functions squared?
2
[square root (78)] squared = 78. There is not a surd from for an integer.
Do you mean: What is the square root of (8 squared)? If so, there are two answers: 8 and -8. Or do you mean: What is the (square root of 8) squared? If so, there is only one answer: 8.
it is 18 because when you put all the numbers back into the square root it becomes the square root of 18 and the square root of 18 squared would be 18
2x square root 6x y squared
1 +/- the square root of 3
You should square root both the top and bottom of the equation, which would give you (√2x)/x.
is (x^2)/2=x then (x^2)=2x then x=square root of (2x)
Let the width = X. The length is twice the width plus 5. So the length must be 2X + 5. Area = 63 ft squared = X multiplied by 2X + 5 = 2X squared + 25. 2X squared = 63 - 25 = 38 2X = square root of 38. Therefore the width is the square root of 38 divided by 2 and the length is the square root of 38 plus 5.
- ln ((x^2)-4)
I think you've left out something. Is one of the "x" functions squared?
The square root of 4x^2 is solved by first doing the square root of 4. This is plus or minus two - because -2 x -2=4. The square root of x^2 is x. So the answers are 2x or -2x. If your question was (4x)^2, then the answer would be 4x.
If you mean: 2x squared = 50 Divide both sides by 2: x squared = 25 Square root both sides: x = 5
The square root of A2 is... A !
The square root of 28 minus the squared root of 7 =±2.64575131
Any square root squared is the number inside the ()