t平方减2t开中括号t平方减2开小括号t减3收小括号收中括号._数学解答

t平方减2t开中括号t平方减2开小括号t减3收小括号收中括号.

人气：340 ℃　时间：2020-05-27 04:27:37

解答

t^2 - 2t[t^2-2(t-3)]
=t^2 - 2t[t^2-2t+6)]
=t^2 - 2t^3+4t^2-12t
=5t^2 - 2t^3-12t
= -t(2t^2-5t +12)
= -t(2t^2+3t -8t +12)=-t[t(2t+3)-4(2t+3)]
= -t(2t+3)(t-4)