Question

Select the two values of x that are roots of this equation.

x - 5x+2=0

A. X=
5+33
B. X=
C. x=
5+ _17
2
D. x-5-3​

Answer 1

A and C

x = -(√17 - 5)/2, (√17 + 5)/2

Explanation:

Quadratic Formula:
`x = (-b +/-√(b^2-4ac) )/(2a)`

Step 1: Use quadratic formula

a = 1, b = -5, c = 2

`x = (5 +/-√((-5)^2-4(1)(2)) )/(2(1))`

`x = (5 +/-√(25-8) )/(2)`

`x = (5 +/-√(17) )/(2)`