4/5 \div 7/9

解答

\frac{4}{5} \div \frac{7}{9}

\frac{36}{35}

十进制

1.02857 \dots

求解步骤

\frac{4}{5} \div \frac{7}{9}

使用分式法则:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= \frac{4}{5} \times \frac{9}{7}

分式相乘:

\frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d}

= \frac{4 \times 9}{5 \times 7}

数字相乘:

4 \times 9 = 36

= \frac{36}{5 \times 7}

数字相乘:

5 \times 7 = 35

= \frac{36}{35}

s im pl i f y \frac{12 k ^{8}}{4 ( k ^{5} ) ^{2}}

s im pl i f y \frac{x ^{4} - 1}{x + 1}

s im pl i f y \frac{- 3}{5}

5 \frac{3}{7}

f a c t or x^{3} + x - x^{2} - 1