EG^2X-EGX=0 EGX(EGX-1)=0 EGX=1 X=PI/4+PI*K K∈Z EGX=0 X=PI*N n∈Z
2x-3-2x+x²-1≤0
x²-4≤0
(x-2)(x+2)≤0
x=2 x=-2
x∈[-2;2]
25x^5 - 16x^3y^3 = x^3( 25x^2 - 16y^3 )
27x^3 - y^3 = ( 3x )^3 - y^3 = ( 3x - y )( 9x^2 + 3xy + y^2 )
243x^5 - 1 = (3x )^5 - 1^5 = ( 3x - 1 )( 81x^4 + 27x^3 + 9x^2 + 3x + 1 )
x ∈ {2*пи*k, 2*пи*k-2*пи/3, 2*пи*k+2*пи/3}, k ∈ Z;