Question

x^2-7x-8
РЕШИТЕ ПЛИЗЗЗ)))

Answer 1

D=7^2-4*1*(-8)=49+32=81
$sqrt{D}$=9
$x_{1}$=(7+9)/2=8
$x_{2}$= (7-9)/2=-1

Answer 2

х²-7х-8=0
Д=7²- 4·1·(-8)=49+32=81
х один равен = -(-7)+√81/2=7+9/2=8
х два равен = -(-7)-√81/2=7-9/2=-1

Answer 3

так???