f(x)=(t+1)²+2(t+1) =t²+2t+1+2t+2=(t+1)²+2(t+1) =t²+2t+1+2t+2 怎么算出2个2t了 能不能一步步的解啊
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![f(x)=(t+1)²+2(t+1) =t²+2t+1+2t+2=(t+1)²+2(t+1) =t²+2t+1+2t+2 怎么算出2个2t了 能不能一步步的解啊](/uploads/image/z/4559662-46-2.jpg?t=f%28x%29%3D%28t%2B1%29%26%23178%3B%2B2%28t%2B1%29+%3Dt%26%23178%3B%2B2t%2B1%2B2t%2B2%3D%28t%2B1%29%26%23178%3B%2B2%28t%2B1%29+%3Dt%26%23178%3B%2B2t%2B1%2B2t%2B2+%E6%80%8E%E4%B9%88%E7%AE%97%E5%87%BA2%E4%B8%AA2t%E4%BA%86+%E8%83%BD%E4%B8%8D%E8%83%BD%E4%B8%80%E6%AD%A5%E6%AD%A5%E7%9A%84%E8%A7%A3%E5%95%8A)
f(x)=(t+1)²+2(t+1) =t²+2t+1+2t+2=(t+1)²+2(t+1) =t²+2t+1+2t+2 怎么算出2个2t了 能不能一步步的解啊
f(x)=(t+1)²+2(t+1) =t²+2t+1+2t+2
=(t+1)²+2(t+1)
=t²+2t+1+2t+2
怎么算出2个2t了 能不能一步步的解啊
f(x)=(t+1)²+2(t+1) =t²+2t+1+2t+2=(t+1)²+2(t+1) =t²+2t+1+2t+2 怎么算出2个2t了 能不能一步步的解啊
(t+1)²+2(t+1)
=(t²+2t+1)+(2t+2)
=t²+2t+1+2t+2
f(x)=(t+1)²+2(t+1) =(t+1)²+2(t+1)+1-1=(t+1+1)²-1=(t+2)²-1