m2+n2 |
m2?n2 |
m?n |
m+n |
2mn |
(m+n)2(m?n) |
=
m2+n2?m2+2mn?n2 |
m2?n2 |
(m+n)2(m?n) |
2mn |
=
2mn |
(m+n)(m?n) |
(m+n)2(m?n) |
2mn |
=m+n,(m≠±n)
取當(dāng)m=2,n=1時(shí)m+n=3.
m2+n2 |
m2?n2 |
m?n |
m+n |
2mn |
(m+n)2(m?n) |
m2+n2 |
m2?n2 |
m?n |
m+n |
2mn |
(m+n)2(m?n) |
m2+n2?m2+2mn?n2 |
m2?n2 |
(m+n)2(m?n) |
2mn |
2mn |
(m+n)(m?n) |
(m+n)2(m?n) |
2mn |