问题
填空题
已知a+b=-8,ab=8,化简b
|
答案
∵a+b=-8,ab=8,∴a,b同为负数,
故原式=b
+aab a2
=(ab b2
-b -a
)a b
,ab
即-(a+b)2-2ab ab
=-ab
×64-2×8 8
=-128
.2
已知a+b=-8,ab=8,化简b
|
∵a+b=-8,ab=8,∴a,b同为负数,
故原式=b
+aab a2
=(ab b2
-b -a
)a b
,ab
即-(a+b)2-2ab ab
=-ab
×64-2×8 8
=-128
.2