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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: 4a+6b/a-1 chia 4a^2 +12ab +9b^2 /1-a^3

Toán Lớp 8: 4a+6b/a-1 chia 4a^2 +12ab +9b^2 /1-a^3

Comments ( 1 )

  1. \frac{4a+6b}{a-1} : \frac{4a^2 +12ab +9b^2}{1-a^3}
    = \frac{2^2 .a+(2.3)b}{a-1} : \frac{(2a)^2 +2(2a)(3b)+(3b)^2}{-a^3 +1}
    =-\frac{2(a+a^2 +1)}{2a+3b}
     

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222-9+11+12:2*14+14 = ? ( )