(22223³+11112³)÷(22223³+11111³)=?(1999³-2×1999²-1997)÷(1999³+1999²-2000)=?因式分解(x+y+z)²+yz(y+z)+xyz
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(22223³+11112³)÷(22223³+11111³)=?(1999³-2×1999²-1997)÷(1999³+1999²-2000)=?因式分解(x+y+z)²+yz(y+z)+xyz
(22223³+11112³)÷(22223³+11111³)=?
(1999³-2×1999²-1997)÷(1999³+1999²-2000)=?
因式分解(x+y+z)²+yz(y+z)+xyz
(22223³+11112³)÷(22223³+11111³)=?(1999³-2×1999²-1997)÷(1999³+1999²-2000)=?因式分解(x+y+z)²+yz(y+z)+xyz
(22223³+11112³)÷(22223+11111³)
=(22223+11112)(22223²-22223×11112+11112²)
÷(22223+11111))(22223²-22223×11111+11111²)
=33335[22223(22223-11112)+11112²]÷33334[22223(22223-11111)+11111²]
=33335[22223×11111+11112²]÷33334[22223×11112+11111²]
=33335[22223×11111+(11111+1)²]÷33334[22223×(11111+1)+11111²]
=33335[22223×11111+11111²+22222+1]÷33334[22223×11111+22223+11111²]
=33335[22223×11111+22223+11111²]÷33334[22223×11111+22223+11111²]
=33335÷33334
(1999³-2×1999²-1997)÷(1999³+1999²-2000)
=[1999²(1999-2)-1997]÷[1999²(1999+1)-2000]
=[1999²×1997-1997]÷[1999²×2000-2000]
=1997(1999²-1)÷2000(1999²-1)
=1997/2000
(x+y+z)²+yz(y+z)+xyz
=(x+y+z)²+yz(y+z+x)
=(x+y+z)(x+y+z+yz)
a^3+b^3=(a+b)(a^2-ab+b^2) 见图 (x+y+z)²+yz(y+z)+xyz =(x+y+z)²+yz(y+z+x) =(x+y+z)(x+y+z+yz)
a^3+b^3=(a+b)(a^2-ab+b^2)
(22223³+11112³)÷(22223³+11111³)=(22223+11112)/(22223+11111) * ((22223^2-22223*11112+11112^2)/(22223^2-22223*11111+11111^2))
=33335/33334 * ((222...
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a^3+b^3=(a+b)(a^2-ab+b^2)
(22223³+11112³)÷(22223³+11111³)=(22223+11112)/(22223+11111) * ((22223^2-22223*11112+11112^2)/(22223^2-22223*11111+11111^2))
=33335/33334 * ((22223^2-11111*1112)/(22223^2-11111*11112))=33335/33334
(1999³-2×1999²-1997)÷(1999³+1999²-2000)
=[1999²(1999-2)-1997]÷[1999²(1999+1)-2000]
=[1999²×1997-1997]÷[1999²×2000-2000]
=1997(1999²-1)÷2000(1999²-1)
=1997/2000
(x+y+z)²+yz(y+z)+xyz
=(x+y+z)²+yz(y+z+x)
=(x+y+z)(x+y+z+yz)
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