Решите уравнение (4-x)(4+x)=x^2-2

Question

Решите уравнение
(4-x)(4+x)=x^2-2

Answer 1

16+4Х-4Х-Х^2=X^2-2
-2X^2=-2-16
X^2=9
X=+-3

Answer 2

(4-х)(4+х)=х²-2
16-х²=х²-2
-2х²=-18
х=3

Comments

точн

---

там +-3