What should come in place of the question mark (?) in the following questions:
`255 + 22+ 12 = (?)^2`

Options

A. 9
B. `sqrt3`
C. 3
D. 27

Answer

To solve the equation \( 255 + 22 + 12 = (?)^2 \), we will follow these steps:

### Step 1: Add the numbers on the left side of the equation.
We start by adding \( 22 \) and \( 12 \):
\[ 22 + 12 = 34 \]

### Step 2: Add the result to \( 255 \).
Now, we add \( 255 \) to \( 34 \):
\[ 255 + 34 = 289 \]

### Step 3: Set the equation.
Now we can rewrite the equation:
\[ 289 = (?)^2 \]

### Step 4: Take the square root of both sides.
To find the value of \( ? \), we take the square root of both sides:
\[ ? = \sqrt{289} \]

### Step 5: Calculate the square root.
Calculating the square root gives us:
\[ ? = 17 \]

Thus, the value that should come in place of the question mark is \( 17 \).

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