A.-x2+y2 | B.-x2-y2 | C.x2-y2 | D.x2+y2 |
A.(a+b)(a+b) | B.(a-b)(b-a) | C.(a-b)(-b+a) | D.(a-b)(-a-b) |
A.(m-n)(n-m) | B.(a+b)(-a-b) | C.(-a-b)(a-b) | D.(a+b)(a+b) |
A.0 | B.2 | C.4 | D.6 |
99×101+1 |
251-247 |
A.(x-3)(-x+3) | B.(2a2-b)(2a2+b) | C.(-xy-2)(xy-2) | D.(x3-y3)(x3+y3) |
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