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2 |
1 |
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1 |
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5 |
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A.(x+9)(x-9) | B.(x+9)(-x-9) | C.(-x+9)(-x-9) | D.(-x-9)(x-9) |
A.(a-b)2=a2-b2 | B.(a-b)2=a2+2ab+b2 |
C.(a+b)2=a2+b2 | D.(a+b)(a-b)=a2-b2 |
A.(
| B.(x+2)(2+x) | C.(-a+b)(a-b) | D.(x-2)(x+1) |
A.(x-y)2=x2-y2 | B.(a+3)2=a2+9 |
C.(a+b)(-a-b)=a2-b2 | D.(x-y)(y+x)=x2-y2 |
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