Question

Calcule: 2X2 +5x-3=0

Answer 1

a=2 b=5 c=-3

x=-5+-\5^2-4.2.(-3)/2.2

x=-5+-\25+24/4

x=-5+-\49/4

x=-5+-7/4


x'=-5+7/4= -20+7/4 =-13/4

x"=-5-7/4=-20-7/4= -27/4

S{-13/4 ; -27/4}