Question

determinati solutiile ecuatiei 5x^2+3x-2=0 care apartine multimii Q/Z​

Answer 1

Răspuns:

Succes!

Explicație pas cu pas:

$5x^{2}+3x-2=0\\a=5\\b=3\\c=-2\\DELTA=b^{2}-4ac=3^{2}-4*5*(-2)=9+40=349\\= > \sqrt{DELTA}=\sqrt{49}=7\\\\\\x_{1}=-b+\sqrt{DELTA}/2a=-3+7/10=4/10=2/5\\x_{2}=-b-\sqrt{DELTA}/2a=-3-7/10=-10/10=-1$