题目内容
(1)计算:2×(-3)+16×(
)2-20130.
(2)解方程:x2-6x+8=0.
1 |
2 |
(2)解方程:x2-6x+8=0.
(1)原式=-6+16×
-1
=-6+4-1
=-3;
(2)∵(x-2)(x-4)=0,
∴x-2=0或x-4=0,
∴x1=2,x2=4.
1 |
4 |
=-6+4-1
=-3;
(2)∵(x-2)(x-4)=0,
∴x-2=0或x-4=0,
∴x1=2,x2=4.
练习册系列答案
相关题目