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

Toán Lớp 8: a,6x-3 /5x^2 +x nhân 25x^2 +10x +1/ 1-8x^3

Toán Lớp 8: a,6x-3 /5x^2 +x nhân 25x^2 +10x +1/ 1-8x^3

Comments ( 1 )

  1. a)\frac{6x-3}{5x^2+x}.\frac{25x^2+10x+1}{1-8x^3}
    =\frac{3(2x-1)}{x(5x+1)}.\frac{(5x+1)^2}{(1-2x)(1+2x+4x^2)}
    =\frac{3(2x-1)(5x+1)^2}{x(5x+1)(1-2x)(1+2x+4x^2)}
    =\frac{3(5x+1)}{-x(1+2x+4x^2)}
     

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

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