10/х+6=1
10/x=1-6
10/x= -5
x= 10:(-5)
x=-2
Ответ: x=-2
3x^2-4x-4=0
D=b^2-4ac=(-4)^2-4*3*(-4)=16+48=64
√D=8
x1=4+8 / 6 = 2
x2= 4-8 / 6 = - 4 / 6 = - 2 / 3
(1-cos² a)sin² a-sin⁴ a +sin a ,если :1)а= 30°,2)=60°
(1-cos² a)sin² a-sin⁴ a +sin a = sin²α•sin²α-sin⁴α+sinα= sin⁴α- sin⁴α+sinα=sinα; sin30=1/2; sin60=√3/2.