Question

Fie A multimea solutiilor reale ale ecuatiei 2x²+5x-3=0 determinati multimea a\{-3;-1

Answer 1

Răspuns:

Explicație pas cu pas:

2x²+5x-3=0   x1,2=-5+-√25+24/4=-5+-7/4    

x1=-5-7/4=-12/4=-3

x2=-5+7/4=1/2

a={-3;1/2}   a/{-3,-1}={1/2}