Question

[nguyen anh ngoc ly]

giai phuong trinh (Đặt ẩn phụ)

(x+2)(x-2)(x²-10)=0

Answer 1

[Phan Thanh Tịnh]

(x + 2)(x - 2)(x² - 10) = 0 => x + 2 = 0 hay x - 2 = 0 hoặc x² - 10 = 0 =>\(x\in\left\{-\sqrt{10};-2;2;\sqrt{10}\right\}\)