已知一个多项式M与-3^2b的积是21a^3b^2c^2-9a^4b^5+6a^3b,求M

已知一个多项式M与-3^2b的积是21a^3b^2c^2-9a^4b^5+6a^3b,求M
已知一个多项式M与-3^2b的积是21a^3b^2c^2-9a^4b^5+6a^3b,求M

已知一个多项式M与-3^2b的积是21a^3b^2c^2-9a^4b^5+6a^3b,求M
M=(21a^3b^2c^2-9a^4b^5+6a^3b)/(-9b)
=-(7a^3bc^2-3a^4b^4+2a^3)/3

M=（21a^3b^2c^2-9a^4b^5+6a^3b）/（-3^2b）=-7a^3bc^2 /3 +a^4b^4 -2a^3 /3