已知(a-b)²=3,ab=-1/2,求(a+b)²的值

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/28 10:08:01
已知(a-b)²=3,ab=-1/2,求(a+b)²的值已知(a-b)²=3,ab=-1/2,求(a+b)²的值已知(a-b)²=3,ab=-1/2,

已知(a-b)²=3,ab=-1/2,求(a+b)²的值
已知(a-b)²=3,ab=-1/2,求(a+b)²的值

已知(a-b)²=3,ab=-1/2,求(a+b)²的值
(a+b)²
=(a-b)²+4ab
=3+4×(-1/2)
=3-2
=1