①化简:(根号5+根号6)(根号5-根号6) ②解方程:x²+2x+6=1-4x①化简:(根号5+根号6)(根号5-根号6)②解方程:x²+2x+6=1-4x
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![①化简:(根号5+根号6)(根号5-根号6) ②解方程:x²+2x+6=1-4x①化简:(根号5+根号6)(根号5-根号6)②解方程:x²+2x+6=1-4x](/uploads/image/z/584639-71-9.jpg?t=%E2%91%A0%E5%8C%96%E7%AE%80%EF%BC%9A%28%E6%A0%B9%E5%8F%B75%2B%E6%A0%B9%E5%8F%B76%29%28%E6%A0%B9%E5%8F%B75-%E6%A0%B9%E5%8F%B76%29+%E2%91%A1%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9Ax%26%23178%3B%2B2x%2B6%3D1-4x%E2%91%A0%E5%8C%96%E7%AE%80%EF%BC%9A%28%E6%A0%B9%E5%8F%B75%2B%E6%A0%B9%E5%8F%B76%29%28%E6%A0%B9%E5%8F%B75-%E6%A0%B9%E5%8F%B76%29%E2%91%A1%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9Ax%26%23178%3B%2B2x%2B6%3D1-4x)
①化简:(根号5+根号6)(根号5-根号6) ②解方程:x²+2x+6=1-4x①化简:(根号5+根号6)(根号5-根号6)②解方程:x²+2x+6=1-4x
①化简:(根号5+根号6)(根号5-根号6) ②解方程:x²+2x+6=1-4x
①化简:(根号5+根号6)(根号5-根号6)
②解方程:x²+2x+6=1-4x
①化简:(根号5+根号6)(根号5-根号6) ②解方程:x²+2x+6=1-4x①化简:(根号5+根号6)(根号5-根号6)②解方程:x²+2x+6=1-4x
①化简:(根号5+根号6)(根号5-根号6)
=(根号5)²-(根号6)²
=5-6
=-1
②解方程:
x²+2x+6=1-4x
x²+6x+5=0
(x+1)(x+5)=0
x=-1或x=-5
①化简:(根号5+根号6)(根号5-根号6)
=5-6=-1
②解方程:x²+2x+6=1-4x
x²+6x+5=0
(x+1)(x+5)=0
x=-1或-5
①化简:(根号5+根号6)(根号5-根号6)=﹙√5﹚²-﹙√6﹚²=5-6=﹣1
②解方程:x²+2x+6=1-4x
x²+6x+5=0
﹙x+1﹚﹙x+5﹚=0
x+1=0或x+5=0
x=﹣1或﹣5
1、(根号5+根号6)(根号5-根号6)=(根号5)^2-(根号6)^2=5-6=-1
2、x²+2x+6=1-4x
整理后为,x²+6x+5=0
1 1
1 5
可分解为(x+1)(x+5)=0
得,x1=-1 ,x2=-5
①(根号5+根号6)(根号5-根号6)
=根号5的平方-根号6的平方
=5-6
=-1
②解方程:x²+2x+6=1-4x
x²+2x+6=1-4x
x²+6x+5=0
x=-1 x=-5