You can put this solution on YOUR website! 3+5x-2x^2=0
-2x^2+5x+3=0
2x^2-5x-3=0 multiply each side by -1
2*-3=-6. The 2 factors of -6 whose sum is -5 are -6 and 1.
2x^2+x-6x-3=0
x(2x+1)-3(2x+1)=0
(x-3)(2x+1)=0 factoring by grouping
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x=3
2x=-1, x=-1/2
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Ed