1 |
x2 |
1 |
y2 |
x+y |
xy |
1 |
x |
1 |
y |
1 |
x2 |
1 |
x |
1 |
y |
1 |
y2 |
1 |
x2 |
1 |
xy |
1 |
y2 |
1 |
x2 |
1 |
y2 |
|
3 | -27 |
2 |
1 |
4 |
A.(x+1)(x-1)=x2+1 | B.x2+6x+9=x(x+6)+9 |
C.a2-16+3a=(a+4)(a-4)+3a | D.x2+3x+2=(x+1)(x+2) |
A.a(x+y)=ax+ay | B.x2-4x+4=x(x-4)+4 |
C.10x2-5x=5x(2x-1) | D.x2-16+3x=(x-4)(x+4)+3x |
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