(x-y)²=36
x+y=-4
x= -4-y
(-4-y-y)²=36
x=-4-y
4y²+16y-20=0
y²+4y-5=0
(y+5)(y-1)=0
y1= -5
x1= 1
y2= 1
x2= -5
ответ( (1;-5); (-5;1)
2) c²+c²-10c+25-13=0
2c²-10c+12=0
c²-5c+6=0
D= 25-24= 1
c1= (5+1)/2= 3
y1= -2
c2= (5-1)/2= 2
y2= -3
3) x= 2+y
y²-2y(2+y)=3
x=2+y
y²-4y-2y²-3=0
-y²-4y-3=0
y²+4y+3=0
(y+3)(y+1)=0
y1= -3
x1= -1
y2= -1
x2= 1
(-1;-3); (1; -1)
ответ: во вложении Объяснение:
(x-y)²=36
x+y=-4
x= -4-y
(-4-y-y)²=36
x=-4-y
4y²+16y-20=0
x=-4-y
y²+4y-5=0
x=-4-y
(y+5)(y-1)=0
y1= -5
x1= 1
y2= 1
x2= -5
ответ( (1;-5); (-5;1)
2) c²+c²-10c+25-13=0
2c²-10c+12=0
c²-5c+6=0
D= 25-24= 1
c1= (5+1)/2= 3
y1= -2
c2= (5-1)/2= 2
y2= -3
3) x= 2+y
y²-2y(2+y)=3
x=2+y
y²-4y-2y²-3=0
x=2+y
-y²-4y-3=0
x=2+y
y²+4y+3=0
x=2+y
(y+3)(y+1)=0
y1= -3
x1= -1
y2= -1
x2= 1
(-1;-3); (1; -1)
ответ: во вложении Объяснение: