(vi) (2xy +3z)(2xy +9z)
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Answer:
=2x^2 y^2+24xyz+27z^2
Step-by-step explanation:
(2xy+3z)(2xy+9z)
=2xy(2xy+9z)+3z(2xy+9z)
=4x^2 y^2+18xyz+6xyz+27z^2
=2x^2y^2+24xyz+27z^2
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