If x-1/x = 9 find the value of x +1/x

Step-by-step explanation:

Given

x - = 9 ← square both sides

(x - )² = 9²

x² - 2 + = 81 ( add 2 to both sides )

x² + = 83

Now

(x + )² = x² + + 2, thus

x² + = 83 + 2 = 85

(x + )²= 85 ( take the square root of both sides)

x + =

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step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft