/a-4/+/b-8/=0,a+b/axb=?

/a-4/+/b-8/=0,a+b/axb=?

If both a and B are real numbers, then we can get the following results from the meaning of non negative numbers: a = 4, B = 8

4x2 + y2-4x-6y + 10 = 0, find the value of (2 / 3 x process, 9x + Y's Square under the root times x under the root divided by Y's Cube) - (x's Square times one of X under the root minus 5x times y under the root divided by x)

4X ^ 2 + y ^ 2-4x-6y + 10 = 0 (4x ^ 2-4x + 1) + (y ^ 2-6y + 9) = 0 (2x-1) ^ 2 + (Y-3) ^ 2 = 0, so, x = 1 / 2, y = 3 (2 / 3x √ 9x + Y2 √ X / Y3) - (x2 √ 1 / x-5x √ Y / x) = 2x √ x + √ xy-x √ X-5 √ xy = x √ x-4 √ xy = √ 2 / 4-2 √ 6 = (√ 2-8 √ 6) / 4

Party A and Party B come from the East and west villages at the same time, and meet at 900 meters away from the East Village. After meeting, they continue to move forward. After arriving at the East and west villages, they immediately turn around and walk towards each other, and meet again at 700 meters away from the West Village. How many meters is the distance between the East and west villages?
I know your answer is right. Where are the three 900s?

Party A and Party B come from the East and west villages at the same time, and meet at 900 meters away from the East Village. It means that Party A walked 900 meters when they met. After meeting, they continue to move forward. When they arrive at the East and west villages, they immediately turn around and walk towards each other. They meet again at 700 meters away from the West Village. At this time, they meet for the second time, and they walk three whole courses, so Party A