Bai 3: Thu gon ve hang dang thuc: 1) (2x+1)2+2(2x+1)+1 2) (3x-2y)2 +4(3x-2y) +4 3) (x+3)2+(x-2)2-2(x+3)(x-2) 4) (3x-5)2-2(3x-5)(3x+5)+(3x+5) 5) (x-y)2+(x+y)2-2(x+y)(x-y) 6) (5-x)+(x+5)2-(2x+10)(x-5)  Hellppp giúp mik vs

Bai 3: Thu gon ve hang dang thuc: 1) (2x+1)2+2(2x+1)+1 2) (3x-2y)2 +4(3x-2y) +4 3) (x+3)2+(x-2)2-2(x+3)(x-2) 4) (3x-5)2-2(3x-5)(3x+5)+(3x+5) 5) (x-y)2+(x+y)2-2(x+y)(x-y) 6) (5-x)+(x+5)2-(2x+10)(x-5)  Hellppp giúp mik vs
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