Question

спростіть вираз 20a⁴b⁹/4a⁸b⁸​

Answer 1

5b/a⁴.,,.,.,.,.,.,,.

Answer 2

$\displaystyle\frac{20}{4} =20:4=5;\\\frac{b^9}{b^8} =b^{9-8} =b^1=b;\\a^4:a^8=a^{8-4} =a^4\Rightarrow\\\frac{20a^4b^9}{4a^8b^8} =\frac{5b}{a^4} .$