y2 − [-5y − y(-7y − 9)] − [-y (15y + 4)] = 0
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Y2 - [-5y +7y2 +9y - [-15y2 - 4y]=0
Y2 - [-5y +7y2 +9y+ 15y2 +4y] =0
Y2 - [22y2 - 8y]=0
Y2 =22y2 - 8y
All terms divided by y we get
I. e, y=22y - 8
Y - 22y =-8
-21y = - 8
Y = 8/21
Y2 - [-5y +7y2 +9y+ 15y2 +4y] =0
Y2 - [22y2 - 8y]=0
Y2 =22y2 - 8y
All terms divided by y we get
I. e, y=22y - 8
Y - 22y =-8
-21y = - 8
Y = 8/21
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