Question

\(\frac{^{\left(-7,5\right)^3}}{\left(2,5\right)^3}\)

Answer 1

\(\frac{\left(-7,5\right)^3}{2,5^3}=\left(\frac{-7,5}{2,5}\right)^3\)

\(=\left(-3\right)^3\)

\(=-27\)

Answer 2

\(\frac{\left(-7,5\right)^3}{\left(2,5\right)^3}=\frac{-7,5\cdot\left(-7,5\right)\cdot\left(-7,5\right)}{2,5\cdot2,5\cdot2,5}=-3\cdot\left(-3\right)\cdot\left(-3\right)=\left(-3\right)^3=-27\)

Answer 3

\(\frac{\left(-7,5\right)^3}{\left(2,5\right)^3}=\frac{-3\cdot\left(2,5\right)^3}{\left(2,5\right)^3}=-3\)

Answer 4

\(\frac{\left(-7,5\right)^3}{\left(2,5\right)^3}\)

\(=\frac{\left(-7,5\right)\cdot\left(-7,5\right)\cdot\left(-7,5\right)}{2,5\cdot2,5\cdot2,5}\)

\(=\left(-3\right)\cdot\left(-3\right)\cdot\left(-3\right)\)

\(=\left(-3\right)^3\)

\(=-27\)

Answer 5

\(\frac{\left(-7,5\right)^3}{\left(2,5\right)^3}\)=\(\left(\frac{-7,5}{2,5}\right)^3\)=\(\left(-3\right)^3\)=\(-27\)

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Answer 6

\(\frac{\left(-7,5\right)^3}{\left(2,5\right)^3}=\frac{\left(-3\times2,5\right)^3}{\left(2,5\right)}=\frac{\left(-3\right)^3\times\left(2,5\right)^3}{\left(2,5\right)^3}=-9\)

Answer 7

\(\frac{\left(-7,5\right)^3}{\left(2,5\right)^3}\)

\(=\left(\frac{-7,5}{2,5}\right)^3\)

\(=\left(-3\right)^3\)

\(=-27\)

Áp dụng công thức : \(\frac{a^m}{b^m}=\left(\frac{a}{b}\right)^m\)

Answer 8

\(\frac{\left(-7.5\right)^3}{2.5^3}=\frac{\left(-7.5\right)^3}{2.5}\)

\(\left(-3\right)^3\)

\(-27\)