Question

решите уравнение: x^2+7x+6=o

Answer 1

x^2+7x+6=0
D = 7^2 - 4*1*6 = 49 - 24 = 25 = 5^2
x1 = -7 + 5 /2 = -2/2 = -1
x2 = -7 - 5 /2 = -12/2 = - 6

Answer 2

D=b^2-4ac=49-24=25
x=-7-5/2=-6
x=-7+5/2=-1