Question

Question 6 of 10Select the two values of x that are roots of this equation.X2 + 1 = 5xA.X=-1- 192OBB. ,x-=-*-1+ /19X =2O C. X-5 - 212D. X =5+ 121

Answer 1

x^2 + 1 = 5x

Subtract 5x from each side

x^2 -5x + 1 = 0

a=1 b = -5 c= 1

Using the quadratic formula

There are two solutions

( 5- sqrt(21))

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2

and

( 5+ sqrt(21))

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2