Mathematics
Junior High
Solved
(2X+3Y)(2X-3Y)-2(2X-3Y)の式から答えをどう出せば良いですか?
(5) 4x (x-1)-9y (y-1)-3y
2
=4x²-4x-9y²+9y-3y
=4x²-4x-9y²+6y=(4x²-9y) - (4x-6y)
= (2x+3y)
(2x-3y)-2(2x-3y)
= (2x-3y) (2x+3y-2)
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