Question

[Jenny_2690]

\(\dfrac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}\)

Answer 1

[NGUYỄN THỊ QUỲNH]

tử số=3^6.45^4-15^13.5^-9=3^6.(5.3^2)^4-(3.5)^13.5^-9=3^6.5^4.3^8-3^13.5^13.5^-9=3^14.5^4-3^13.5^4(3-1)=2.3^13.5^4

mẫu số=27^4.25^3+45^6=3^12.5^6+3^12.5^6=2.3^12.5^6

phân số =(2.3^13.5^4)/2.3^12.5^6=3/25

Answer 2

[Jenny_2690]

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