Math
posted by Anna .
The expression ax^3+2x^2+cx+1 is 5x^33 greater than 3x^3+bx^2+d7x. Find a, b, c, and d.

ax^3+2x^2+cx+1 ( 5x^33)=3x^3+bx^2+d7x
x^3(a53)+x^2(2b)+x(c+7)+(1+3)d)=0
check that
then,if it is right, a=8, b=2, c=7, d=4