问题
填空题
分解因式:x2-9=______;x2-x+
|
答案
x2-9=(x+3)(x-3);
x2-x+
=(x+1 4
)2;1 2
a3-a
=a(a2-1)
=a(a+1)(a-1).
故答案是:(x+3)(x-3);(x+
)2;a(a+1)(a-1).1 2
分解因式:x2-9=______;x2-x+
|
x2-9=(x+3)(x-3);
x2-x+
=(x+1 4
)2;1 2
a3-a
=a(a2-1)
=a(a+1)(a-1).
故答案是:(x+3)(x-3);(x+
)2;a(a+1)(a-1).1 2