A(a+1)-(a-3)^2= a^2+a-(a^2-6a=9)=a^2+a -a^2+6a-9=7a-9 при <span>a=-1 7*(-1)-9=-16</span>
A^2 = B
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B^2 - 5B + 4
D = 25 -4*1*4 = 9 ; V D = 3
B1 = ( 5 + 3 ) : 2 = 4
B2 = 2 : 2 = 1
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( B - 4*) ( B - 1 )
( A^2 - 4)*( A^2 - 1) = ( A - 2)*(A + 2)*( A - 1)*( A + 1 )
(sin²α-1)/cos⁴α+tg²α=(sin²α-(sin²α+cos²α))/cos⁴α+sin²α/cos²α=
=-cos²α/cos⁴α+sin²α/cos²α=-1/cos²α+sin²α/cos²α=(sin²α-1)/cos²α=
=(sin²α-(sin²α+cos²α))/cos²α=-cos²α/cos²α≡-1.
1) 2)
имя любимое мое твое именно
дурацкое ограничение