(1)x^3·x^5+x·x^3 (2)(-5)^2×25×(-5)^4

问题描述:

(1)x^3·x^5+x·x^3 (2)(-5)^2×25×(-5)^4
(1)x^3·x^5+x·x^3 (2)(-5)^2×25×(-5)^4

(1)x^3·x^5+x·x^3
=x^8+x^4
(2)(-5)^2×25×(-5)^4
=5²×5²×5^4
=5^8