Odpowiedzi

2010-03-03T12:58:32+01:00
I Sposób
r = |SP|
|SP|=√(4-(-2))² + (-5(-3))² = √6² + (-2)² = √36+4 = √40 = 2√10
S= (a,b) = (-2,-3)
(x-a)² + (y-b)² = r²
(x+2)² + (y+3)² = 40

II Sposób
S = (-2,-3) P = (4, -5)
(x-a)² + (y-b)² = r²
(4-(-2))² + (-5-(-3)²=r²
(4+2)² + (-5+3)² = r²
6² + (-2)² = r²
36 + 4 = r²
40 = r²
(x+2)² + (y+3)² = 40