If `p` is the length of perpendicular from point `(1,1)` to the straight line `ax+by+a+b=0`, then prove that :
`p^(2)=4+(8ab)/(a^(2)+b^(2))`

Explanation

To prove that the length of the perpendicular \( p \) from the point \( (1, 1) \) to the straight line \( ax + by + a + b = 0 \) satisfies the equation \( p^2 = 4 + \frac{8ab}{a^2 + b^2} \), we will follow these steps:

### Step 1: Identify the line and point
The line is given by the equation:
\[ ax + by + a + b = 0 \]
and the point is \( P(1, 1) \).
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