Question

Решить неравенство:
(x-3)√x^2+4<=x^2-9

Answer 1

(x-3)√x^2+4<=x^2-9

x²-3x+4 ≤ x²-9 (√x²=x)

x²-x²-3x+4+9 ≤ 0

-3x+13  ≤ 0

-3x ≤ -13 | :(-3)

x ≥ 4,3 (3)