mi aiutereste
ΡC^2 = 2^2 + x^2+
ΡD^2 = 2^2 + (x + 2)^2+
ΡΜ^2 = 1^2 + (x + 2)^2+
----------------------------=
3·Α·Ρ^2 = 3·(2 + x)^2 con x = ΒΡ (in cm)
Quindi:
(x^2 + 4) + (x^2 + 4·x + 8) + (x^2 + 4·x + 5) =
=3·x^2 + 12·x + 12
3·x^2 + 8·x + 17 = 3·x^2 + 12·x + 12
3·x^2 + 12·x + 12 - (3·x^2 + 8·x + 17) = 0
4·x - 5 = 0---> x = 5/4 = 1.25 cm