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2 |
1 |
2 |
1 |
2 |
1 |
2 |
A.x2+2xy-y2 | B.-x2+2xy+y2 | C.x2+xy+y2 | D.
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A.x(y2-9) | B.x(y+3)2 | C.x(y+3)(y-3) | D.x(y+9)(y-9) |
A.(a+ab)(a-ab) | B.a(a2-b2) | C.a(a+b)(a-b) | D.a(a-b)2 |
A.4-x2+3x=(2-x)(2+x)+3x | B.-x2+3x+4=-(x+4)(x-1) |
C.1-2x+x2=(1-x)2 | D.x2y-xy+x3y=x(xy-y+x2y) |
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