Bonsoir,
[tex]a = \frac{15 {}^{4} }{5 {}^{4} } [/tex]
[tex]a = \frac{ 3 {}^{4} \times 5 {}^{4} }{5 {}^{4} } [/tex]
[tex]a = 3 {}^{4} [/tex]
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[tex]b = \frac{27 {}^{2} }{3 {}^{2} } [/tex]
[tex]b = \frac{3 {}^{6} }{3 {}^{2} } [/tex]
[tex]b = 3 {}^{4} [/tex]
Bonne soirée.
