Question

x²-2x+1=0 Hal kyeje
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Answer 1

Step-by-step explanation:

step 1 Address the input parameters and values

Quadratic Equation : x2 - 2x - 1 = 0

step 2 Substitute a , b and c values in below formula

x =- b ± √b² - 4ac2a

=-(-2) ± √(-22 - 4 (1) (-1))2(1)

=2± √4 - 4 (1)(-1)2

=2± √4 + 42

=2± √82

step 3 Solve the above expression for minus & plus values

x1 =2 + √82

=2 + 2.82842

x2 =2 - √82

=2 - 2.82842

step 4 By simplifying the above expressions for x1 & x2

x1 =4.82842

x1 = 2.4142

x2 =-0.82842

x2 = -0.4142

x1 = 2.4142 & x2 = -0.4142 are the roots for equation x2 - 2x - 1 = 0