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Sagot :

Réponse :

[tex]15^{3}[/tex] × [tex]\frac{3^{-2} }{5^{2}}[/tex] × [tex]45^{-2}[/tex]

= [tex](5*3)^{3}[/tex] × [tex]\frac{3^{-2} }{5^{2}}[/tex] × [tex](5*9)^{-2}[/tex]

= [tex]5^{3}[/tex] × [tex]3^{3}[/tex] × [tex]\frac{3^{-2} }{5^{2}}[/tex] × [tex](5*3^{2} )^{-2}[/tex]

= [tex]5^{3}[/tex] × [tex]3^{3}[/tex] × [tex]\frac{3^{-2} }{5^{2}}[/tex] × [tex]5^{1*(-2)}[/tex] × [tex]3^{2*(-2)}[/tex]

= [tex]5^{3}[/tex] × [tex]3^{3}[/tex] × [tex]\frac{3^{-2} }{5^{2}}[/tex] × [tex]5^{-2}[/tex] × [tex]3^{-4}[/tex]

= [tex]5^{3 - 2 + (-2)}[/tex] × [tex]3^{3 + (-2) + (-4)}[/tex]

= [tex]5^{-1}[/tex] × [tex]3^{-3}[/tex]

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