已知x+y=2,则(x+y)2次方-10x-10y+25=

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已知x+y=2,则(x+y)2次方-10x-10y+25=已知x+y=2,则(x+y)2次方-10x-10y+25=已知x+y=2,则(x+y)2次方-10x-10y+25=(x+y)²-1

已知x+y=2,则(x+y)2次方-10x-10y+25=
已知x+y=2,则(x+y)2次方-10x-10y+25=

已知x+y=2,则(x+y)2次方-10x-10y+25=
(x + y)²- 10x - 10y + 25
= (x + y)²- 10(x + y) + 25
= 2² - 10×2 + 25
= 4 - 20 + 25
= 9