Question

b(2b-1/b)-2b(b-1/b).solve it by steps

Answer 1

$b(2b \: - \frac{1}{b} ) - 2b(b - \frac{1}{b} ) \\ = 2 {b}^{2} - 1 - 2 {b}^{2} + 2 \\ = - 1 + 2 \\ = 1$