题文
下列各式计算正确的是 ( )
A.(x+3)(x-3)= -3; |
B.(2x-3)(2x+3)=2 -9 |
C.(2x+3)(x-3)=4 -9; |
D.(5ab+1)(5ab-1)=25 -1 |
下列各式计算正确的是 ( )
A.(x+3)(x-3)= -3; |
B.(2x-3)(2x+3)=2 -9 |
C.(2x+3)(x-3)=4 -9; |
D.(5ab+1)(5ab-1)=25 -1 |
试题篮
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