(Y+3)²-2=0RT

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(Y+3)²-2=0RT(Y+3)²-2=0RT(Y+3)²-2=0RT移项(y+3)²=2y+3=±√2y=-3-√2,y=-3+√2

(Y+3)²-2=0RT
(Y+3)²-2=0
RT

(Y+3)²-2=0RT
移项
(y+3)²=2
y+3=±√2
y=-3-√2,y=-3+√2