Is a Quadratic Expression a Perfect Square Only If the Coefficient of x is Even? Parma and Jarrod's Solutions Explained

Parma and Jarrod's solutions show that Nigel is correct because in both cases, the quadratic expressions are perfect squares. Parma's solution involves expanding and factoring the expression, while Jarrod's solution uses the concept of identical factors. In both cases, the coefficient of x is even, which aligns with Nigel's statement that a quadratic expression cannot be a perfect square unless the coefficient of x is even. This supports Nigel's assertion and validates his statement.