2(X^2)^2×X^3-(3X^3)^3+(5X)^2×X^7

问题描述:

2(X^2)^2×X^3-(3X^3)^3+(5X)^2×X^7
2(X^3)^2×X^3-(3X^3)^3+(5X)^2×X^7上边的打错了,抱歉!

2(X^3)^2×X^3-(3X^3)^3+(5X)^2×X^7
=2x^6*x^3-27x^9+5x^9
=2x^9-22x^9
=-20x^9