Mathematics
Senior High
この−6って、かっこの中の数に掛けないんですか?
PG-208
(2) (x²+x+2)(x²+x-3)
=
{(x²+x)+2}{(x²+x)-3}
= (x²+x)²-(x²+x)-6
=
(d+do+1
(x++2x³+x²) x²-x-6
=x²+2x³-x-6
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