Form the differential equation of the family of circles in the second quadrant and touching the coordinate axes.

Explanation

To form the differential equation of the family of circles in the second quadrant that touch the coordinate axes, we can follow these steps:

### Step 1: Write the equation of the circle
The general equation of a circle that touches the coordinate axes and is located in the second quadrant can be expressed as:

\[ (x + A)^2 + (y - A)^2 = A^2 \]
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