Question 271956
Use binomial expansion to expand the following (2x-3y)^4 
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= (2x-3y)(2x-3y)
= 2x(2x-3y)-3y(2x-3y
= 4x^2 - 6xy -6xy + 9y^2
= 4x^2-12xy+9y^2
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Cheers,
Stan H.