Question

помогите............... ​

Answer 1

$\frac{4(3b^{6})^{2}}{b^{12}b^{2}}=\frac{4*9*b^{12} }{b^{12}*b^{2}}=\boxed{\frac{36}{b^{2} }} \\\\b=\sqrt{48}\\\\\frac{36}{b^{2} }=\frac{36}{(\sqrt{48})^{2}}=\frac{36}{48}=\boxed{0,75}$