A.a2+2a-1 | B.x2+xy+y2 | C.-x2-2xy-y2 | D.x2+y2 |
A.a(x+y)=ax+ay | B.10x2-5x=5x(2x-1) |
C.x2-4x+4=x(x-4)+4 | D.x2-16+3x=(x-4)(x+4)+3x |
A.(x-3)(x+3)=x2-9 | B.x2+1=x(x+
| ||
C.3x2-3x+1=3x(x-1)+1 | D.a2-2ab+b2=(a-b)2 |
A.a-2 | B.a+2 | C.2-a | D.-2-a |
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