3（x³）²×x³－﹙3x³﹚³＋﹙5x﹚²×x的七次方_数学解答

3（x³）²×x³－﹙3x³﹚³＋﹙5x﹚²×x的七次方

人气：398 ℃　时间：2020-01-30 12:26:34

解答

原式=3*x^6*x^3-3^3*x^9+5^2*x^2*x^7
=3*x(6+3)-27*x^9+25*x^(2+7)
=3*x^9-27*x^9+25*x^9
=(3-27+25)*x^9
=x^9