Question

(a²+b²)²-4a²b² = ? *​

Answer 1

(a²+b²)²-4a²b² = ?

$= (ab^{2})^{2} - 4a \times b^{2}$

$= {ab}^{2 \times 2} - {4ab}^{2}$

$= {ab}^{4} - {4ab}^{2}$