Question

-3x^2-20x-25=0 помогите

Answer 1

-3x^2-20x-25=0 умножаем на -1
3x^2+20x+25=0
D=400 - 4*3*25= 400-300=100=10^2
x1= (-20+10)/6= -10/6= -4 1/6
x2 = (-20-10)/6 = -30/6 = -5

Answer 2

-3х²-20х-25=0
D=(-20)²-4×(-3)×(-25)=100    
√D=10
х1=(20+10)÷6=5
х2=(20-10)÷6=1 целая 2÷3