a |
b |
b |
a |
a2+b2 |
ab |
a2-b2-(a2+b2) |
ab |
-2b2 |
ab |
2b |
a |
2b |
a |
A.-a2-4ab+4b2 | B.a2+6ab-9b2 |
C.a2+6a+9b2 | D.4(a-b)2+4(a-b)+1 |
A.1-a-b+ab=(1-a)(1-b) | B.1+a+b+ab=(1+a)(1+b) |
C.1-a+b+ab=(1-a)(1+b) | D.1+a-b-ab=(1+a)(1-b) |
A.xyz-xy2=xy(z-xy) | B.3a2y-3ay-9y=3y(a2-a-3) |
C.-x2+xy-xz=-x(x2+y-z) | D.a2b+5ab-b=b(a2+5a) |
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