Question

-x^2-10x-23=0 , помогите решить!

Answer 1

-x^2-10x-23=0 |* (-1)
x^2 +10x + 23 =0
D= b^2 - 4ac
D= 100 - 4*1*23 = 8
x1 = -10+ 2√2 / 2 = -5+√2
x2= -5- √2