`A = 2003 × 14 + 1988 + 2001 × 2002/2002 + 2002 × 503 + 504 × 2022`
`A = 2002 × 14 + 14 + 1988 + 2001 × 2002/2002 × 1 + 2002 × 503 + 504 × 2002`
`A = 2002 × 14 + 2002 + 2001 × 2002/2002 × 1 + 2002 × 503 + 504 × 2002`
`A = 2002 × 14 + 2002 × 1 + 2001 × 2002/2002 × 1 + 2002 × 503 + 504 × 2002`
`A = 2002 × (14 + 1 + 2001)/2002 × (1 + 503 + 504)`
`A = 14 + 1 + 2002/1 + 503 + 504`
`A = 2016/1008`
`A = 2`
= 2002 x 14 + 14 + 1988 + 2001 x 2002 / 2002 x 1 + 2002 x 503 + 504 x 2002
= 2002 x 14 + 2002 + 2001 x 2002 / 2002 x 1 + 2002 x 503 + 504 x 2002
= 2002 x 14 + 2002 x 1 + 2001 x 2002 / 2002 x 1 + 2002 x 503 + 504 x 2002
=2002x (14 + 1 + 2001) /2002x (1 + 503 + 504)
= 14 + 1 + 2001 / 1 + 503 + 504
= 2016/1008 = 2
phân tích đa hức thành nhân tử a, x^2 - 4x^2y^2+y^2+2xy b, x^6 - y^6 e, (a+b+c)^2 + (a+b - c)^2 - 4c^2
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