(a+1/a+b)^2-(a-1/a+b)^2怎么解啊(a+1/a+b)^2-(a-1/a+b)^2咋么解啊!
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(a+1/a+b)^2-(a-1/a+b)^2怎么解啊(a+1/a+b)^2-(a-1/a+b)^2咋么解啊!
(a+1/a+b)^2-(a-1/a+b)^2怎么解啊
(a+1/a+b)^2-(a-1/a+b)^2咋么解啊!
(a+1/a+b)^2-(a-1/a+b)^2怎么解啊(a+1/a+b)^2-(a-1/a+b)^2咋么解啊!
=[(a+1/a+b)+(a-1/a+b)][(a+1/a+b)-(a-1/a+b)]
=(a+1/a+b+a-1/a+b)(a+1/a+b-a+1/a-b)
=(2a+2b)2/a
=(4a+4b)/a
a^2-b^2=(a+b)(a-b)
利用这个公式就可以了
原式=【(a+1/a+b)+(a-1/a+b)】【(a+1/a+b)--(a-1/a+b)】
=4a/a+b