Question

[YẾN NHI]

5x2³⁰x3¹⁸-4x3²⁰x2²⁷

5x2⁹x2¹⁹x3¹⁹-7x2²⁹x3¹⁸

đây là phân số đấy nha

Answer 1

[Ngo Tung Lam]

       \(\frac{5.2^{30}.3^{18}-4.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)

\(=\frac{5.2^{28}.2^2.3^{18}-4.3^{18}.3^2.2^{27}}{5.2^{28}.3^{18}.3-7.2^{27}.2^2.3^{18}}\)

\(=\frac{3^{18}.\left(5.2^{28}.4-4.9.2^{27}\right)}{3^{18}.\left(5.3.2^{28}-7.2^{27}.4\right)}\)

\(=\frac{20.2^{28}-9.2.2.2^{27}}{15.2^{28}-14.2.2^{27}}\)

\(=\frac{2^{28}.20-18.2^{28}}{15.2^{28}-14.2^{28}}\)

\(=\frac{2^{28}.\left(20-18\right)}{2^{28}.\left(15-14\right)}\)

\(=\frac{2^{28}.2}{2^{28}1}\)

\(=2\)

Answer 2

[Đình Danh Nguyễn]

=2/1 = 2