若M·(二分之三x²-5y三次方)=25y六次方-

若M·(二分之三x²-5y三次方)=25y六次方-四分之九x四次方,则M等于

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M·(3/2x²-5y³)=25y⁶-9/4x⁴M=(25y⁶-9/4x⁴)÷ (3/2x²-5y³) =[-(9/4x⁴- 25y⁶)] ÷ (3/2x²-5y³) =[-(3/2x²+5y³) (3/2x²-5y³)] ÷ (3/2x²-5y³) =-(3/2x²+5y³)
=-3/2x²-5y³)