ile wynosi tu promień? rówanie okręgu

[józef92]

\(\displaystyle{ y^{2}+x^{2}+2y+4 \le 36}\)

\(\displaystyle{ \sqrt{32}}\)??

[matmi]

\(\displaystyle{ \sqrt{33}}\)

[józef92]

jak to?

[matmi]

Mamy:
\(\displaystyle{ y^{2}+x^{2}+2y+4 \le 36}\)

\(\displaystyle{ y^{2}+x^{2}+2y+4 =(y+1)^{2}-1+x^{2}+4=(y+1)^{2}+x^{2}+3 \le 36}\)

[józef92]

tak już wiem.