Mathematics, 18.10.2021 07:30 kyriebarnes143

Thực hiện phép tính: a) ( 3 – xy2 )2 – ( 2 + xy2 )2
b) 9x2 – ( 3x – 4 )2
c) ( a – b2 )( a + b2 )
d) ( a2 + 2a + 3 )( a2 + 2a – 3 )
e) ( x – y + 6 )( x + y – 6 )
f) ( y + 2z – 3 )( y – 2z – 3 )

Answers: 1

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Thực hiện phép tính: a) ( 3 – xy2 )2 – ( 2 + xy2 )2
b) 9x2 – ( 3x – 4 )2
c) ( a – b2 )...