Mathematics
Senior High
Solved
どうやって赤線から青線の式にしたんですか？
-2)-(2x+3y)(-2x+3y)=(3x-2y) + (2x+3y) (2x-3y)
(3x)-2-3x-2y+(2y)*+(2x)-(3y)*
=9x-12xy+412+4x²-9y4
=13x-12xy-5y
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