Mathematics
Senior High
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紫のところの式はなぜこうなるんですか??
細かく教えてください<(_ _)>
回のla+b+c)le+B+°-eb - be-La)
{atlb+c)3 Ea'-(btc) a+(16°-bctc)3
=aそa? (bf)at (6-bc+)3+(bte)ペ-btcJa+l6-bctè)3く
>a?- lbtc)a*+ (-bc+2)a t(btcla-(bfc)a +(btc)(ピ-bctを)
- a'+{-1btc)+ (btc)3a'+{b-betè)- 16t2bctè at16 +
- a'+ (-b_c tb+c)a'+ (ピ-betc_b-2bc -è)a+(8+è)
- a' -3bc xa+ b°+ c?
: a? + b° + c' - 3abe
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分配法則です