问题
填空题
(1)x2+4x+______=(x+______)2;(2)x2-3x+______=(x-______)2
答案
(1)x2+4x+4,
=(x+2)2;
(2)x2-3x+
=(x-9 4
)2.3 2
(1)x2+4x+______=(x+______)2;(2)x2-3x+______=(x-______)2
(1)x2+4x+4,
=(x+2)2;
(2)x2-3x+
=(x-9 4
)2.3 2