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10x^2=20x+30
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10x^2-20x-30 I hope you see the pattern..
divide by 10 and you get
x^2-2x-3 lol
\[x ^{2}-2x-3=0\]
Then\[(x-3)(x+1)=0\]
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or factored is (x-3)(x+1)
exactly across
and than x_1=3 and x_2=-1
this is understandably ?
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