Using quadratic formula solve the following quadratic equations: `p^2x^2+(p^2-q^2)x-q^2=0,p!=0` `9x^2-9(a+b)x+(2a^2+5a b+2b^2)=0`

Explanation

To solve the quadratic equations using the quadratic formula, we will follow these steps for each equation provided.

### Equation 1:
**Given:** \( p^2x^2 + (p^2 - q^2)x - q^2 = 0 \)

1. **Identify coefficients:**
- Here, \( a = p^2 \), \( b = p^2 - q^2 \), and \( c = -q^2 \).

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