当a=2.2,b=-7.8时,求a+3b/a²-b²·a²+2ab+b²/(a+3b)(a-b)

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当a=2.2,b=-7.8时,求a+3b/a²-b²·a²+2ab+b²/(a+3b)(a-b)当a=2.2,b=-7.8时,求a+3b/a²-b&#

当a=2.2,b=-7.8时,求a+3b/a²-b²·a²+2ab+b²/(a+3b)(a-b)
当a=2.2,b=-7.8时,求a+3b/a²-b²·a²+2ab+b²/(a+3b)(a-b)

当a=2.2,b=-7.8时,求a+3b/a²-b²·a²+2ab+b²/(a+3b)(a-b)