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2 |
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1 |
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4 |
A.(x+1)(x-1)=x2-1 | B.(a+b)(a-b)=a2-b2 |
C.(2x+1)(2x-1)=2x2-1 | D.(-a+b)(-a-b)=a2-b2 |
A.(a-b)(a+b)=a2+b2 | B.(a-b)2=a2-b2 |
C.(a+b)2=a2+ab+b2 | D.(m-1)2=m2-2m+1 |
A.2 | B.4 | C.6 | D.8 |
A.(2x-3)(2x+3)=4x2-9 | B.(-2x+3y)(3y+2x)=9y2-4x2 |
C.(-2a+3)2=4a2+9-12a | D.(-4x-1)2=16x2-8x+1 |
A.8x2-2 | B.8x2-x-2 | C.8x2+4x-2 | D.8x2-2x-2 |
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