Mathematics
Senior High
なぜ2段目の様な式になるのでしょうか?降べきの順に並べるとy^3が先にきてy^2で括ろうと思ったのですがなぜこうなるのでしょうか?因数分解のコツを教えてください😭
2
(3) x²y+y²z- y³ – x² z
2
= (x² y − y³) + (y² — x²) z
= (x² − y²)y — (x² − y²) z
= (x² − y²)(y — 2)
z)
= (x+y)(x−y) (y — z)
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