A.(x-y)2=(y-x)2 | B.(x+6)(x-6)=x2-6 |
C.(x+y)2=x2+y2 | D.6(x-2)+x(2-x)=(x-2)(x-6) |
A.(a3+b3)(a3-b3) | B.(a2+b2)(b2-a2) |
C.(2x2y+1)2x2y-1) | D.(x2-2y)(2x+y2) |
A.-4y | B.4y | C.2y2 | D.2-2y |
A.(x+3y)(x-3y)=x2-3y2 | B.(x+3y)(x-3y)=x2-9y2 |
C.(-x+3y)(x-3y)=-x2-9y2 | D.(-x-3y)(x+3y)=x2-9y2 |
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