Question

Please tell me who are intelligent in ace please answer this

Answer 1

Correct answer would be x = (3 +-(13)^1/2)/2.

Using quadartic formulae.

HOPE THIS HELPS YOU

Answer 2

Answer:

                     Here you go mate.

Step-by-step explanation:

Given :

           x - 1  = 3

                 x

        (x × x) - 1  = 3

              x

x² - 1 = 3x

x² - 3x - 1 = 0

This is in the form ax² + bx + c = 0

From this:

                a = 1   ,   b = -3   ,   c = -1

Formula :

               x =   - b ± √D   ,        where D = b² - 4ac

                             2a

D = ( -3 )² - ( 4 × 1 × -1 )

   = 9 + 4

   = 13

x  =   - b ± √D  

            2a

For x = positive:

                  x  = - ( -3 ) + √13

                               2 × 1

                  x = 3 + √13

                             2

For x = Negative :

                 x = - ( -3 ) - √13

                            2 × 1

                     = 3 - √13

                             2

Answer : x = 3 + √13   ,   3 - √13

                           2                 2

Hope it Helps.

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