nini999

Verified answer

Bonjour :

a. 5²×5⁴=5²⁺⁴=5⁶
b.6⁵×6⁻⁸=6⁵⁺⁽⁻⁸⁾=5⁵⁻⁸=5⁻³
c.3⁴×5⁴=(3×5)⁴=15⁴
d.2.5⁻⁷×4.2⁻⁷=(2.5×4.2)⁻⁷=10.5⁻⁷
e.-4×(-4)⁻⁷=4¹⁺⁽⁻⁷⁾=4¹⁻⁷=4⁶
f.7⁻⁵×7=7⁻⁵⁺¹=7⁻⁴
g.(-2)⁻³×(-2)⁵=2⁻³⁺⁵=2²
h.(2/3)⁻³×(2/3)⁻⁵=(2/3)⁻³⁺⁽⁻⁵⁾=(2/3)⁻³⁻⁵=(2/3)⁻⁸

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