来自戴晓晖的问题
(X^2-0.3X+0.5)(X-0.2)最好简便
(X^2-0.3X+0.5)(X-0.2)最好简便
1回答
2020-10-26 19:27
(X^2-0.3X+0.5)(X-0.2)最好简便
(X^2-0.3X+0.5)(X-0.2)最好简便
没什么简便的,就是乘出来
(X^2-0.3X+0.5)(X-0.2)
=X^3-0.2X^2-0.3X^2+0.06X+0.5X-0.1
=X^3-0.5X^2+0.56X-0.1