A.(x+xy)(x-xy) | B.x(x2-y2) | C.x(x-y2) | D.x(x-y)(x+y) |
A.x2-9+6x=(x+3)(x-3)+6x | B.(x+5)(x-2)=x2+3x-10 | ||
C.x2-8x+16=(x-4)2 | D.x2+x+1=x(x+1+
|
A.3(-2xn-x2n) | B.-3xn(2-xn) | C.-3(2xn+x2n) | D.-3xn(2+xn) |
A.-22001 | B.-22002 | C.22001 | D.-2 |
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