Question

Помогите срочно , ВЫЧИСЛИ ​

Answer 1

$\dfrac{(b^{-5})^{2}}{b^{-12} }=\dfrac{b^{-5\cdot2} }{b^{-12} }=\dfrac{b^{-10} }{b^{-12} }=b^{-10-(-12)}=b^{-10+12} =b^{2}\\\\b=5 \ \ \Rightarrow \ b^{2}=5^{2} =\boxed{25}$