Question

икс в 2 + 10 .икс +7= 0

Answer 1

х²+10х+7=0
D=10²-4*7=72=$(6 sqrt{2})^{2}$
x1,2 = (-10+-6$sqrt{2}$)/2=-5+-3$sqrt{2}$

Answer 2

$x^{2} +10x+7=0   D/4= (b/2 )^{2}-ac D/4=25-7=18 x_{1} , x_{2} = frac{ frac{-b}{2}+- sqrt frac{D}{4} }{a} x_{1} , x_{2} = -5 +/-3sqrt{2}$