解(-5)^5x5^3×(-5)^7
=[-(5)]^5x5^3×[-(5)]^7
=(-1)(5)^5x5^3×(-1)(5)^7
=(5)^5x5^3×(5)^7
=5^(5+3+7)
=5^(15)
(b-a)^2·(a-b)
=[-(a-b)]^2·(a-b)
=(-1)^2(a-b)^2·(a-b)
=(a-b)^2×(a-b)
=(a-b)^3
(-5)^5x5^3×(-5)^7
=(-5)^5×(-5)^7×5^3
=5^12×5^3
=5^15
(b-a)^2·(a-b)
=(a-b)²×(a-b)
=(a-b)³
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(-5)^(5+7)*(5)^3=5^15
(a-b)^3
结果:5^15
(-5)^5x5^3×(-5)^7
=(-5^5)x5^3×(-5^7)
=5^5×5^3×5^7
=5^(5+3+7)
=5^15