>>278

(1)1/(2+x)^2=10
(x+2)^2=1/10
(x+2)=±1/√10
x=-2±(1/√10)
(2)1/(2+y)^4=30
(y+2)^4=1/30
(y+2)^2=1/√30＞０
(y+2)=±1/√30
y=-2±(1/√30)