Question

5х(в квадрате)+2x-3=0

Answer 1

5x^2+2x-3=0
D=b^2-4ac
D=4+60=64=8^2
x1,2=(-b+ - sqrt (D))/(2a)
x1= (-2 + 8)/10=0,6
x2= (-2 - 8)/10= -1

Answer 2

Д= 2^2-4*5*(-3)= 4+60=64
Х1= (-2+8)/2*5= 6/10=0,6
Х2= (-2-8)/2*5= -10/10 = -1