<span>- x</span>²<span> + 4x + 5 = 0
D = 4</span>² - 4 * (-1) * 5 = 16 + 20 = 36 > 0
D > 0 , значит уравнение имеет два корня
=(60/160 - 8/160) * 10/1=52/160 * 10/1 = 52/16 = 3,25
= m <span> (y+1)+ n</span><span> (y+1)+k</span><span> <span>(y+1)=</span></span>(<span> y+1) </span><span> (v+n+k)</span>
(x-y)^2=x^2-2xy+y^2
(x+y)^2=x^2+2xy+y^2
x^2-y^2=(x-y)(x+y)
(x+y)^3=x^3+3x^2y+3xy^2+y^3
(x-y)^3=x^3-x^2y+3xy^2-y^3
x^3-y^3=(x-y)(x^2+xy+y^2)
x^3+y^3=(x+y)(x^2-xy+y^2)