问题
填空题
(1)x2+6x+______=(x+______)2;
(2)x2-3x+______=(x-______)2;
(3)x2______+16=(x______)2.
答案
(1)x2+6x+9=(x+3)2;
(2)x2-3x+
=(x-9 4
)2;3 2
(3)x2±8x+16=(x±4)2.
(1)x2+6x+______=(x+______)2;
(2)x2-3x+______=(x-______)2;
(3)x2______+16=(x______)2.
(1)x2+6x+9=(x+3)2;
(2)x2-3x+
=(x-9 4
)2;3 2
(3)x2±8x+16=(x±4)2.