10000 |
2522-2482 |
10000 |
(252+248)(252-248) |
10000 |
500×4 |
10000 |
2000 |
A.4x2-4x+1=(2x-1)2 | B.x3-x=x(x2-1) |
C.x2y-xy2=xy(x-y) | D.x2-y2=(x+y)(x-y) |
A.x2-8x+9 | B.a2+14a+49 | C.4x2-20x-25 | D.-2ab+a2-b2 |
A.8xy-6x2=2(4xy-3x2) | B.3x-
| ||||
C.4x3+8x2+4x=4x(x2+2x+1) | D.16x2-4=4(4x2-1) |
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