(2/3)^2=(2/3)*(2/3)
(1/3)^2-√(4/9)=1/9-2/3=(1-6)/9=-5/9
(2/4)^2+x=5/8
x=5/8-4/16=6/16=3/8
81-m²+14m-49=14m-m²+32=16m-m²+32-2m=m(16-m)+2(16-m)=(m+2)(16-m)
Sinπ/2+cosπ/2=1+0=1
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Ответ 1
y=x^2(x-1)+(x-1)=(x-1)(x^2+1)
y=0 x-1=0 x=1
x^2+1=0 (это уравнение не имеет решения)
1/(1-3√5)+1/(1+3√5)=(1-3√5+1+3√5)/(1-45)=2/(-44)=-1/22