Question

A=15^3.45^4:25^2.9^4

Answer 1

\(\frac{15^3.45^4}{25^{2.}.9^4}=\frac{3.5.3.5.3.5.5.9.5.9.5.9.5.9}{5.5.5.5.3.3.3.3.3.3.3.3}=\frac{5^{3.}.9.3}{1}=3375\)

Answer 2

A=15³.45⁴:25².9⁴

A=15³.45⁴:25².(9²)²

A=15³.45⁴:25².81²

A=15³.45⁴:(25x81)²

A=15³.45⁴:2025²

A=15³.(45²)²:2025²

A=15³.2025²:2025²

A=15³.1

A=15³

Vậy A=15³

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Answer 3

\(A=\frac{15^3.45^4}{25^2.9^4}=\frac{15^3.\left(5.9\right)^4}{\left(5^2\right)^2.9^4}=\frac{15^3.5^4.9^4}{5^4.9^4}=15^39\)