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

Toán Lớp 8: (2x^2-3x)(5x^2-2x+1) iuuuu❤️❤️❤️

Toán Lớp 8: (2x^2-3x)(5x^2-2x+1)
iuuuu❤️❤️❤️

Comments ( 2 )

  1. $(2x²-3x)(5x²-2x+1)$
    $= 10x^4+4x³+2x²-15x³+6x²-3x$
    $= 10x^4+(4x³-15x³)+(2x²+6x²)-3x$
    $= 10x^4-11x³+8x²-3x$
    $= x(10x³-11x²+8x-3)$
    $#A$
    $#Xin hay nhất$
     

  2. $(2x^2-3x)(5x^2-2x+1)$
    $=10x^4-4x^3+2x^2-15x^3+6x^2-3x$
    $=10x^4-19x^3+8x^2-3x$
    $=x(10x^3-19x^2+8x-3)$

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

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