Question

решите уравнение
14x^2+25x-84=0

Answer 1

14x²+25x-84=0
a=14,b=25,c=-84
D=b²-4ac,D=25²-4.14.(-84)=625+4704=5329,√D=√5329=73
x1=(-25+73)/28=48/28=24/14=12/7=1 5/7
x2=(-25-73)/28=-98/28=-49/14=-7/2=-3,5
x1=1 5/7
x2=-3,5