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

Toán Lớp 8: x^2(x+4)^2-(x+4)^2-(x^2-1) giúp ik

Toán Lớp 8: x^2(x+4)^2-(x+4)^2-(x^2-1) giúp ik

Comments ( 2 )

  1. $x^2\left(x+4\right)^2-\left(x+4\right)^2-\left(x^2-1\right)\\ =\left(x^2-1\right)\left(x+4\right)^2-\left(x^2-1\right)\\ =\left(x^2-1\right)\cdot\left[\left(x+4\right)^2-1\right]\\ =\left(x^2-1\right)\left(x^2+8x+17\right)$
    $#Xin hay nhất$

  2. ~ Bạn tham khảo ~
    x^2(x+4)^2 – (x+4)^2 – (x^2-1)
    = x^2(x^2 + 8x + 16) – (x^2 + 8x + 16) – (x^2-1)
    = x^4 + 8x^3 + 16x^2 – x^2 – 8x – 16 – x^2 + 1
    =x^4 + 8x^3 + 14x^2-8x-15

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