问题
填空题
x2+3x+______=(x+______)2;x2-
|
答案
∵3x=2×
•x,3 2
∴x2+3x+
=(x+9 4
)2;3 2
∵
x=2×4 3
•x,2 3
∴x2-
x+4 3
=(x-4 9
)2.2 3
x2+3x+______=(x+______)2;x2-
|
∵3x=2×
•x,3 2
∴x2+3x+
=(x+9 4
)2;3 2
∵
x=2×4 3
•x,2 3
∴x2-
x+4 3
=(x-4 9
)2.2 3