(х-5у)^2=х^2-25у^2
(м-9)^2=м^2-81
(2х+3)^2=4х^2+9
(3х-4)^2=9х^2-16
(х+3)^3=х^3+27
Y = 3cosx - 2
{y∈R: -5 ≤y ≤ 1}
<span>5a^3-2ab+6b-(a^3+2ab+2b)=4a^3+8b</span>
<span>5a^3-2ab+6b-a^3+2ab+2b=4a^3+8b</span>
<span>4a^3+8b=4a^3+8b</span>
6x² + 18x = 0
6x(x + 3) = 0
или x₁ = 0 или x + 3 = 0 ⇒ x₂ = - 3
Ответ : - 3 ; 0