3 |
2 |
2 |
-b±
| ||
2a |
-5±
| ||
2×3 |
1 |
3 |
-b±
| ||
2a |
-(-8)±
| ||
2×3 |
4+
| ||
3 |
4-
| ||
3 |
2 |
2 |
2 |
-b±
| ||
2a |
2
| ||||
2×1 |
2 |
3 |
2 |
3 |
A.4 | B.-2 | C.4或-2 | D.-4或2 |
A.(x-6)2=43 | B.(x+6)2=43 | C.(x-3)2=16 | D.(x+3)2=16 |
A.x2-4x+4=9 | B.x2-4x+4=7 |
C.x2-4x+16=19 | D.x2-4x+2=5 |
5 |
A.-1,2 | B.1,-2 | C.0,-1,2 | D.0,1,-2 |
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