问题
填空题
在实数范围内因式分解x4-4=______.
答案
x4-4=(x2+2)(x2-2)
=(x2+2)[x2-(
)2]2
=(x2+2)(x+
)(x-2
).2
故答案为:(x2+2)(x+
)(x-2
).2
在实数范围内因式分解x4-4=______.
x4-4=(x2+2)(x2-2)
=(x2+2)[x2-(
)2]2
=(x2+2)(x+
)(x-2
).2
故答案为:(x2+2)(x+
)(x-2
).2