1) 4 и 5
2) -7 и -6
3) -126 и -125
4) -1 и 0
<span> p-51+31 = р-20
Если p = 46, то 46-20=26</span>
{ y = 4 - x
{ x^2 - y = 5
Подставляем 1 уравнение во 2
x^2 - (4 - x) = 5
x^2 + x - 4 - 5 = x^2 + x - 9 = 0
D = 1 + 4*9 = 37
x1 = (-1 - √37)/2; y1 = 4 - (-1 - √37)/2 = (9 + √37)/2
x2 = (-1 + √37)/2; y1 = 4 - (-1 + √37)/2 = (9 - √37)/2
(4,2+6 1/3)+2,8=42/10+19/3+28/10=21/5+19/3+14/5=63/15+95/15+42/15=200/15=40/3=13 1/3