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Kung 2r² yung last variable, eto yung sagot. 
= 2r²+11r+15                     
= (2x+5)(x+3)
= 2x+5=0                   x+3=0
=2x=-5                       x=-3
x= -5/2
x= {-5/2, -3}
3 4 3
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