solve for x (5x+3)(x+3)=3(x-1)
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5x^2 +15x +3x +9 = 3x -1 ⇒5x^2 +15x +10=0 , 5x^2 +10x +5x +10=0 , 5x( x+2 ) +5 (x+2 )=0 , ( 5x +2 ) (x+2 )=0 , x =-5/2 , x=-2
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