Question

If X = Root 8 + Root 7 then find the value of x square - 2 + 1/x square

Answer 1

Answer:

-1

Step-by-step explanation:

x= root8 + roots7

squaring,

x^2 = 8+7 = 15

x^2(-2+1)/ x^2

=(15^2)(-2+1)/(15^2)

= -2+1

= -1