<span>{4х-3у=-1
{2x+4у=-6
{4x-3y=-1
</span>{4x+8у=-12
---------------------
11y=-11
y=-1
2x-4=-6
2x=-2
x=-1
ответ(-1;-1)
ну тогда так nu-4-4u+n+u^3+1=u^3-3+n-4u+nu
(1/13 - 2 3/4) * 26 = - 69 1/2 = - 69,5
1) 1/13 - 2 3/4 = 4/52 - 2 39/52 = - 2 35/52
2) (- 2 35/52) * 26 = (- 139/52) * 26 = -139/2 = - 69 1/2
48х -64х2 +16х-6= 64х -64х2-6 = 2(32х+32х2-3) все