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Question

Remove the second term from the equation:
x36x2+10x3=0.

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Solution

Given equation x36x2+10x3=0
Put x=y+h(y+h)36(y+h)2+10(y+h)3=0
y3+3y2h+3yh2+h36(y2+2hy+h2)+10(y+h)3=0
y3+3y2h+3yh2+h36y212hy6h2+10y+10h3=0
y3+3(h2)y2+(3h212h+10)y+(h36h2+10h3)=0....(1)
To remove second term we have h2=0h=2
Substituting h=2 in (1), required equation is:y3+(1224+10)y+(824+203)=0
y32y+1=0

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