(0.12x^4y³-0.9x²y³）÷0.3x²y²等于?

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(0.12x^4y³-0.9x²y³）÷0.3x²y²等于?(0.12x^4y³-0.9x²y³）÷0.3x²

(0.12x^4y³-0.9x²y³）÷0.3x²y²等于?
(0.12x^4y³-0.9x²y³）÷0.3x²y²等于?

(0.12x^4y³-0.9x²y³）÷0.3x²y²等于?
(0.12x^4y³-0.9x²y³）÷0.3x²y²
=0.4x²y-3y