Question

Решите уравнение
3x^2 - 27 = 0

Answer 1

3x² - 27 = 0,  3 (x²-9)=0, 3(х-3)(х+3)=0,

х₁=3, х₂=-3

Answer 2

3x^2 - 27 = 0

3(х²-9)=0

3(х²-3²)=0

х²-3²=0

(х-3)*(х+3)=0

х-3=0

х+3=0

х=3, х=-3