Given x + 1 / x = 7, the value of radical X-1 / radical x is

Given x + 1 / x = 7, the value of radical X-1 / radical x is

T square = X-2 * radical x * radical x 1 / 1 / X (complete square formula) = x + 1 / X - 2 = 5, so t (i.e. required) = ± √ 5

Given x + 1 / x = root 7, find the value of 2x

x+1/x=√7,x²-x√7=-1,x²-x√7+(√7/2)²=(√7/2)²-1,(x-√7/2)²=3/4,x-√7/2=±√3/2,x=(√7±√3)/2.
∴2x=√7±√3

Factorization, the fourth power of minus four plus the square of 8x minus 16

The fourth power of negative four plus the square of 8x minus 16 = - 256 + 8x & # 178; - 16 = 8x & # 178; - 272 = 8 (X & # 178; - 34) = 8 (x + √ 34) (x - √ 34) the fourth power of negative four plus the square of 8x minus 16 = (- 4) ^ 4 + 8x & # 178; - 16 = 256 + 8x & # 178; - 16 = 8x & # 178; - 240 = 8 (X & # 178; - 30) = 8 (x + √ 30) (x - √ 30)

1. The sum of a polynomial and (7a ^ 2 + 12ab + 7b ^ 2) is (9a ^ 2-12ab + 5B ^ 2) to find the polynomial 2, where a = half and B = half
The second problem is to find the value of a polynomial

1. The polynomial is 9A ^ 2-12ab + 5B ^ 2 - (7a ^ 2 + 12ab + 7b ^ 2) = 2A ^ 2-24ab-2b ^ 2
2. When a = half, B = half, the original formula = - 6