Question

x²_3x=2 equation please solve​

Answer 1

Answer:

compare x² - 3x - 2 = 0 with ax²+bx+c= 0

we get

a = 1 , b = -3 , c = -2

discreminant ( D ) = b² - 4ac

D = ( -3 )² - 4 × 1 × ( -2 )

D = 9 + 8

D = 17

By Quadratic formula ,

x = [ ( - b ± √D )/2a ]

x = [ ( -(-3 ) ± √17 ) ]/( 2 × 1 )

x = ( 3 ± √17 )/2

Therefore ,

x = ( 3 +√17 )/2 or

x = ( 3 - √17 )/2