Mathematics
Senior High
3つめの=の式のところはなんで
x²-3x=0なんですか？
-x²+3xじゃないんですか？
(3) d1b であるから
a·b=0
したがって
(2x + 1) xx+xx (-3x+2)=0
2x²+x-3x² + 2x = 0
ゆえに x= 0, 3
2
x²-3x=0
x(x-3) = 0
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