Question

8*(9/4)^x-30*(3/2)^x+27=0

Answer 1

$8 cdot ( frac{9}{4})^x-30 cdot( frac{3}{2})^x+27=0 \ 8 cdot ( frac {3}{2})^{2x}-30 cdot ( frac {3}{2} ) ^x +3^3 =0\ (frac {3}{2})^x equiv y \ 8y^2-30y+27=0 \ y=frac {3}{2}, y=frac{9}{4} \ x=1, x=2$

Answer 2

спасибо)