问题
填空题
因式分x2-8x+9=______.
答案
x2-8x+9
=x2-8x+16-7
=(x-4)2-(
)27
=(x-4+
)(x-4-7
).7
故答案为:(x-4+
)(x-4-7
).7
因式分x2-8x+9=______.
x2-8x+9
=x2-8x+16-7
=(x-4)2-(
)27
=(x-4+
)(x-4-7
).7
故答案为:(x-4+
)(x-4-7
).7