题目内容
(1)x2+6x+______=(x+______)2;
(2)x2-3x+______=(x-______)2;
(3)x2______+16=(x______)2.
(2)x2-3x+______=(x-______)2;
(3)x2______+16=(x______)2.
(1)x2+6x+9=(x+3)2;
(2)x2-3x+
=(x-
)2;
(3)x2±8x+16=(x±4)2.
(2)x2-3x+
| 9 |
| 4 |
| 3 |
| 2 |
(3)x2±8x+16=(x±4)2.
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