A.-x2-y2+2xy | B.x4+x2y2-2x3y | ||||
C.
| D.x2-xy+
|
1 |
4 |
1 |
2 |
A.a2+4 | B.-x2+9 | C.-x2-y2 | D.5m2-10mn |
A.a2-(-b)2 | B.(-a)2-(-b)2 | C.-a2-(-b)2 | D.-a2+b2 |
A.a2+2ax+4x2 | B.-a2-4ax+4x2 |
C.-2x+1+4x2 | D.x2+4+4x |
A.x2-
| B.-0.01-0.2m-m2 | ||||
C.-y2+6y-9 | D.4a2+12ab+9b2 |
A.2x-y-z | B.2x+y-z | C.2x+y+z | D.4x-y+z |
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