y = (x+2)(x-3)(x-2)(x+1)/(x-2)(x+2)
2(5х-4у+1)-3(3 х-3у+1) =10х-8у+2-9х+9у-3=x-y-1<span> </span>
sin (8*x-π/6)=sinx ;sin (8*x-π/6)- sinx =0 ;
2sin(7x/2 -π/12)*cos(9x/2- -π/12) =0 ;
а) sin(7x/2 -π/12) =0 ;
7x/2 -π/12= π*n ;
x =π/42+ 2πn/7 ,n∈Z.
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б) cos(9x/2 - π/12) =0 ;
9x/2 - π/12 =π/2+π*n ;
x = 7π/54 +2πn/9, n∈Z.
ответ : π/42+ 2πn/7 , 7π/54 +2πn/9 , n∈Z.