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p(x)=0
x=-10
put, x=-10 in eqution
3x+10x-20
3(-10)+10(-10)-20
30+100=20
100=20-30
100=-10
100÷-10
x=- 10
x=-10
put, x=-10 in eqution
3x+10x-20
3(-10)+10(-10)-20
30+100=20
100=20-30
100=-10
100÷-10
x=- 10
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