In the following questions two equation numbered I and II are given You have to solve both equations and . . . . .
(i) `x=sqrt(81)`
(ii) `y^(2)=81`

Answer

To solve the given equations, we will follow these steps:

### Step 1: Solve the first equation
The first equation is:
\[ x = \sqrt{81} \]

To solve this, we can find the square root of 81:
\[ \sqrt{81} = 9 \]

Thus, we have:
\[ x = 9 \]

### Step 2: Solve the second equation
The second equation is:
\[ y^2 = 81 \]

To solve for \( y \), we take the square root of both sides:
\[ y = \sqrt{81} \]

Again, we find the square root:
\[ \sqrt{81} = 9 \]

However, since squaring a number can yield both positive and negative roots, we also consider:
\[ y = -\sqrt{81} = -9 \]

Thus, we have two possible values for \( y \):
\[ y = 9 \quad \text{or} \quad y = -9 \]

### Final Answers
From the above calculations, we conclude:
- For the first equation, \( x = 9 \)
- For the second equation, \( y = 9 \) or \( y = -9 \)

### Summary
The solutions are:
- \( x = 9 \)
- \( y = 9 \) or \( y = -9 \)

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