(m-n)²=8 (m+n)²=2 则m²-n²=?(m-n)²=8 (m+n)²=2 则m²-n²=

(m-n)²=8 (m+n)²=2 则m²-n²=?(m-n)²=8 (m+n)²=2 则m²-n²=
(m-n)²=8 (m+n)²=2 则m²-n²=?
(m-n)²=8 (m+n)²=2 则m²-n²=

(m-n)²=8 (m+n)²=2 则m²-n²=?(m-n)²=8 (m+n)²=2 则m²-n²=
(m-n)²x(m+n)²=8x2
(m²-n²)²=16
m²-n²=±4
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