AB (BC minus a square) plus BC (AC minus b square) plus AC (AB minus C Square) 10 out of (x-1) + 1 out of (X-2 + 3x-4) Find the determinant

1、=（bc^2-a^2c+a^2c-ab^2+ab^2-ac^2）/abc=(b-a)c^2/abc=(b-a)c/ab2、=10/(x+4)(x-1)-(x+1)(x+4)/(x-1)(x+4)+ (x-1)(x+4)/ (x-1)(x+4)=(10-x^2-5x-4+x^2+3x-4)/ (x-1)(x+4)=(2-2x)/ (x-1)(x+4)=-2(x-1)/ (x-1)(x+4...

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