Given √ 25-x & # 178; - √ 15 + X & # 178; = 4, find the value of √ 25-x & # 178; + √ 15 + X & # 178

Given √ 25-x & # 178; - √ 15 + X & # 178; = 4, find the value of √ 25-x & # 178; + √ 15 + X & # 178

√25-x²-√15+x²=4
√25-x²+√15-√15+x²=4+√15
√25-x²+√15+x²=4+2√15

Given √ 25-x & # 178; - √ 15-x & # 178;, find the value of √ 25-x & # 178; + √ 15-x & # 178

Since √ 25-x & # 178; - √ 15-x & # 178;
Let √ 25-x & # 178; - √ 15-x & # 178; = a
Numerator Rationalization
√25-x²-√15-x²
=（√25-x²-√15-x²）（√25-x²+√15-x²）/（√25-x²+√15-x²）
=（25-x²）-（15-x²）/（√25-x²+√15-x²）
=5/（√25-x²+√15-x²）
=a
Then √ 25-x & # 178; + √ 15-x & # 178; = 5 / A
Where (a-b) (a + b) = A & # 178; - B & # 178;

If X-1 = 1 / N & # 178;, then x & # 178; - 2x / N & # 178; + 1 =?
If X-1 = 1 / N & # 178;, then x & # 178; - 2x / N & # 178; + 1 =, what is this!

x(x-1-1)/n^2+1
x[(1/n^2)-1]=n^2-1
x[(1-n^2)/n^2]/(n^2-1)
x[(1-n)(1+n)/(n^2)]/(n-1)(n+1)
=x(-1/n^2)
=-x^2
I just missed one item=