(x-1)kwadrat -(y+2)kwadrat=(x-y)(x+y)
x+y= 1/2
to jest w klamerce : [
(x-1)²-(y+2)²=(x-y)(x+y)
x+y=1/2
x²-2x+1-y²-4y-4=x²+xy-xy-y²
x²-2x-y²-4y-x²-xy=xy=y²=4-1
(x²,y² oraz xy się skracają)
-2x-4y=3
x+y=½
x=1/2 - y
-2(1/2-y)-4y=3
-1+2y-4y=3
-2y=3+1
-2y=4/;(-2)
y=-2
x=½ -(-2)
x=½ +2
x=2½
(x-1)^2-(y+2)^2=(x-y)*(x+y)
x^2+2x+1-y^2-4y-4=x^2-y^2
x=1/2y
x^2 i y^2 się skrócą
2x+1-4y-4=0
2x-4y=3
2(1/2y)-4y=3
y-4y=3
-3y=3/-3
y=-1
x=1/2*(-1)
x=-1/2
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(x-1)²-(y+2)²=(x-y)(x+y)
x+y=1/2
x²-2x+1-y²-4y-4=x²+xy-xy-y²
x²-2x-y²-4y-x²-xy=xy=y²=4-1
(x²,y² oraz xy się skracają)
-2x-4y=3
-2x-4y=3
x+y=½
x=1/2 - y
-2(1/2-y)-4y=3
-1+2y-4y=3
-2y=3+1
-2y=4/;(-2)
y=-2
x=½ -(-2)
x=½ +2
x=2½
(x-1)^2-(y+2)^2=(x-y)*(x+y)
x+y=1/2
x^2+2x+1-y^2-4y-4=x^2-y^2
x=1/2y
x^2 i y^2 się skrócą
2x+1-4y-4=0
x=1/2y
2x-4y=3
x=1/2y
2(1/2y)-4y=3
y-4y=3
-3y=3/-3
y=-1
x=1/2*(-1)
x=-1/2