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#19. x(x + 4) + 5x + 3 = -17 \(x^{2} +4x+5x+3+17=0\) \(x^{2} +4x+5x+20=0\) \(( x^{2} +4x)+(5x+20)=0\) \(x(x+4)+5(x+4)=0\) \((x+5)(x+4)=0\) \(x+5 = 0\) or \(x+4 = 0\) \(x=-5\) or \(x=-4\)