高校问答鸡蛋哥哥绘本故事图片:化简：b/(a+b) + b/(a -b) +(a^2+b^2)/(a^2 -b^2)
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b/(a+b) + b/(a -b) +(a^2+b^2)/(a^2 -b^2)
= b(a-b)/(a+b)(a-b) + b(a+b)/(a -b)(a+b) +(a^2+b^2)/(a^2 -b^2)
= (ab-b^2)/(a^2 -b^2 + (ab+b^2)/(a^2 -b^2) +(a^2+b^2)/(a^2 -b^2)
= (ab-b^2+ab+b^2+a^2+b^2)/(a^2 -b^2)
= (a^2+2ab+b^2)/(a^2 -b^2)
= (a+b)^2/(a+b)(a-b)
= (a+b)/(a-b)
=[b(a-b)+b(a+b)]/[a^2-b^2]+[a^2+b^2]/[a^2-b^2]
=[2ab+a^2+b^2]/[a+b][a-b]
=[a+b]^2/[a+b][a-b]
=[a+b]/[a-b]
化简：b/(a+b) + b/(a -b) +(a^2+b^2)/(a^2 -b^2)
化简:(2a-b-c)/(a-b)(a-c)+(2b-c-a)/(b-c)(b-a)+(2c-a-b)/(c-a)(c-b)
化简：(a+b)^2(b+c-a)(c+a - b)+(a - b)^2(a+b+c)(a+b - c)
{(a-b)/(a+b)}+{(b-c)/(b+c)}+{(c-a)/(c+a)}+{(a-b)(b-c)(c-a)/(a+b)(b+c)(c+a)}
A*B=A+B/AB
a^2+b^2/a+b
a*a-b*b-2b-1
(a+b)+(a+b)=?
A++.A.B+.B是什么意思
a*+b*=(a-b)*+