x2+7x+5=0 - x=-6.19 and x=-0.807, x2+2x-1=0 - x=-2.41 and x=0.414, 5x2+x-2=0 - x=0.540 and x=-0.740, 1+3x2+5x=0 - x=-0.232 and x=-1.43, 10x-1+7x2=0 - x=0.00938 and x=-1.52, 4x2+9x+3=0 - x=-0.407 and x=-1.84, x(7x+1)=5 - x=0.777 and x=-0.920,

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