(33-5y)y+5=45
-5y^2+33y+5-45=0
-5y^2+33y-40=0
5y^2-33y+40=0
y^2-(33/5)y+8=0
y^2-(33/5)y+(33/10)^2-(33/10)^2+8=0
(y-33/10)^2-(33/10)^2+8=0
(y-33/10)^2-1089/100+800/100=0
(y-33/10)^2-289/100=0
(y-33/10)^2=289/100
y-33/10=±17/10
y1=17/10+33/10=5
y2=-17/10+33/10=16/10=1.6
33y-5y^2+5=45
5y^2-33y+40=0
(5y-8)x(y-5)=0
y1=8/5,y2=5
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