factorise the following algebraic expression:
answer is (2x+3y) (2x+3y-2z)
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Answer:
(2x+3y)(2x+3y-2z)
2x(2x+3y-2z)+3y(2x+3y-2z)
4x²+6xy-4xz+6xy+9y²-6yz
4x²+6xy+6xy-4xz+9y²-6yz
4x²+12xy-4xz+9y²-6yz
4x²+9y²+12xy-6yz-4xz
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