Если -2х^2, то
2х(2-х)=0
Х1=0. 2-х=0
Х2=2
Ответ: 0;2
1)х3х8=х11
2)у10у5=у15
3)b21b39=b60
4)к23к17=к40
5)а7а4а9=а20
6)n6n3n2=n11
Sinx+cosx=(1-√3)/2 sinx+cosx=(1/2)+(-√3/2)
sinx*cosx=-√3/4 sinx*cosx=(1/2)*(-√3/2)
sinx=1/2 x₁=π/6+2πn x₂=5π/6+2πn
cosx=-√3/2 x₃=5π/6+2πn x₄=7π/6+2πn
sinx=-√3/2 x₅=4π/3+2πn x₆=5π/3+2πn
cosx=1/2 x₇=π/3+2π x₈=5π/3+2πn
Ответ: x₁=5π/6+2πn x₂=5π/3+2πn.
M2-10mn+25n2/12m3n2:m-5n/6mn= m-5n/2m2n
1).] m2-10mn+25n2/12m3n2=(m-5n)2/12m3n2
2). (m-5n)2 /12m3n2: m-5n/6mn= (m-5n)2*6mn/12m3n2*m-5n= m-5n/2m2n