Mathematics
Senior High
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(2) ฮฑ+6ab-86ยฐ+1
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Mathematics
Senior High
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็ทด็ฟ ๆฌกใฎๅผใๅ ๆฐๅ่งฃใใใ 20 (1) ฮฑ-ใใผc-3abc
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Mathematics
Senior High
(2)ใจ(3)ใงใใ่จ็ฎๆนๆณๆใใฆใใ ใใใ
(2)(a+b-cXab-bc-ca)+ abc =ab-obรฉ-ca'tab-b'c-abe -abe b4ab-2abc -catea.. alabt b-2bc-ac 2 2 2 =a(b-c)ta (b-c) 081-(01+)(e+x(+ +ใณ (6-) (atat(6c)).(6-c)12 (3)* ab(a+b)+bc(6+c)+ca(c+a)+3abc 2.
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Mathematics
Senior High
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(6) 4xยฐyใผ4x22+y?2-y 7 (-4.2+?
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