Question

Решите пожалуйста ))))

Answer 1

$(2b {}^{2} - 1) {}^{2} = (2 {b}^{2} ) {}^{2} - 2 \times 2 {b}^{2} \times 1 + 1 {}^{2} = 4 {b}^{4} - 4 {b}^{2} + 1 \\ \\ - - - - - - - - - - - - - \\ \\ (5 + 3 {c}^{2} ) {}^{2} = 25 + 30 {c}^{2} + 9 {c}^{4} = 9 {c}^{4} + 30 {c}^{2} + 25$