MATH F.2
Expand the folloeing expression .
1.(t+1)^2(t-1)^2
=?
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回答 (4)
✔ 最佳答案
(t+1)^2(t-1)^2
= [(t+1)(t-1)]^2
= (t^2-1)^2
= t^4-2t^2+1
參考: 我喲~~
(t+1)^2 (t-1)^2
= [(t+1)(t-1)]^2
= (t^2-1)^2
= (t^2)^2-2(t^2)(1)+(1)^2
= t^4-2t^2+1
(t+1)^2(t-1)^2
=[(t+1)(t-1)]^2
=[t(t-1)+(t-1)]^2
=(t^2-t+t-1)^2
=t^4-1
參考: 同是F.2的人
(t+1)^2(t-1)^2 = (t+1)²(t-1)²
=[(t+1)(t-1)]².............a²b²=(ab)²
=(t²-1)²...........(a+b)(a-b)=a²-b²
=t^4-2t²+1........(a-b)²=a²-2ab+b²
參考: 會考數學拿c既人~
收錄日期: 2021-04-13 16:12:51
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