Posted by Anna on Tuesday, January 29, 2013 at 6:22pm.
ax^3+2x^2+cx+1 -( 5x^3-3)=3x^3+bx^2+d-7x
x^3(a-5-3)+x^2(2-b)+x(c+7)+(1+3)-d)=0
check that
then,if it is right, a=8, b=2, c=-7, d=4
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