A.4x2-9=(2x+3)(2x-3) | B.y2-6y+9=(y-3)2 |
C.x2+4xy+4y2=(x+2y)2 | D.4x2+8x-1=4x(x+2)-1 |
A.-a2+b2 | B.x2-2x+4 | C.-4m2-9n2 | D.x2+4y2 |
A.x2-xy | B.x2+xy | C.x2+xy+y2 | D.-x2+2xy-y2 |
1 |
2 |
A.3x+2x-1=5x-1 | B.(3a-2b)(3a+2b)=9a2-4b2 |
C.a2-4+3a=(a+2)(a-2)+3a | D.2x2-8y2=2(x+2y)(x-2y) |
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