Mathematics
Senior High
この問題で、置き換える時になぜ4になるのか知りたいです
よろしくお願いします
88-281-4
b²x(−1)a²b²
1)a²³-³8²15
(2) (x²-x+1)(x²-3x+1)
*+(= {(x²+1)-x}{(x²+1)−3x}
-=(x²+1)²-4x(x²+1)+3x²
² = x²+2x² +1-4x³-4x+3x²
+=x²-4x³+5x²-4x+1 -)S+v(x£)S-
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