Question

关于数学题(英文)

find the distance between each pair of points.
1.(√2,-3),(2√2,1) 2.(-√2,√3),(2√2,2√3) 请大家帮我详细解答出来哦`~~美国高中数学题,好象我以前初几在中国就学过了,不过现在忘的一干二净了.大家帮帮忙~!
希望能有解答过程哦~~好心人帮帮. 没过程我光写答案也没用~!

Answer 1

1. 3√2
(2√2-√2)^2+(1-(-3))^2=2+16=18
√18=3√2
2. √21
(2√2-(-√2))^2+(2√3-√3)^2=18+3=21
√21

Answer 2

√（x1—x2）²+（y1—y2）² 代入公式即可

Answer 3

Find the distance between each pair of points.
= 求两点间的距离

1、D = 根号[(2√2 - √2)² + (1 + 3)² ] = 3√2

2、D = 根号[(2√2 + √2)² + (2√3 - √3)²] = √(21)

Answer 4

[（x1-x2）的平方+（y1-y2）的平方]最后开根号