Question

[Nguyễn Trung]

Giúp mình bài này với ạ:

1.    A = ( x- 2)² + ( x + 3)² – 2( x +1)(x- 1)

^2.       B= ( 2x-1)² + 2( 2x-1)(x +1) +( x+1)²

^3.       C = ( x-y)(x +y)( x² +y²)(x⁴+ y⁴)(x⁸ +y⁸)

^4.       D = 3(x – y)² – 2(x + y)² – ( x – y)(x +y)

^5.       E = ( x-1)² -2( x -1)( x-3) + (x -3)²

^6.       F = ( 2x + 3)² + (2x + 3)(2x -6) + ( x-3)²

^7.       G = ( x² + x + 1)(x² – x+1)( x⁴ – x² +1)( x⁸ – x⁴ +1)

^8.       H = ( x -1 )³ +(x +1)³

^9.       I = (x² – 2x + 4)(x + 2) – (x – 2)³ – 6(x -1)(x + 1)

^10.   J = (x -2)(x +2)(x² +4) – ( x² – 3)(x² +3)

^11.   K = ( a +b +c)² +( b+c –a)² +( c+ a-b)²  +( a+b –c)²

^12.   L = ( x-2)³  - (x + 1)(x² – x + 1) + 6(x -1)²

^13.   M = ( x + 1) ⁴ – 6(x + 1)² –(x² – 2)( x² + 2)