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09/17/13 TOÁN LỚP 8 1 TRƯỜNG THCS HUỲNH THÚC KHÁNG 09/17/13 TOÁN LỚP 8 2 09/17/13 TOÁN LỚP 8 3                                        2 2 ( 1) ? 1 ( 1)( 1) x x x x x x − = + + − 09/17/13 TOÁN LỚP 8 4  !"#$ %&"'()#* $+,*-$./-$0 1-2*-$3+-$-4  . . A A M B B M = 567(*-$./-$08 09/17/13 TOÁN LỚP 8 5 %&"'()#* $*'#91 -2*-$3+-$-4 : : A A N B B N = 5%7('#98 09/17/13 TOÁN LỚP 8 6 :;<=&<> §3 RÚT G N PHÂN TH C Ọ Ứ 09/17/13 TOÁN LỚP 8 7 ;?$ 3 2 4 10 x x y @1'#"'()A @?"'()'A :;<=&<B §3 RÚT GỌN PHÂN THỨC 09/17/13 TOÁN LỚP 8 8 2 2x %'#$-4 7( ?"'()' -2 3 3 2 2 2 4 4 .2 10 5 .2 x x x x y y x = 3 4 5 x y = 09/17/13 TOÁN LỚP 8 9 <?$ 8C '()(' D1'#9 8?"'()' 3 2 4 10 x x y 09/17/13 TOÁN LỚP 8 10 E" 2 5 10 5( 2) 25 50 25 ( 2) x x x x x x + + = + + 5( 2) 5 .5( 2) x x x + = + 1 5x =