а) x²-33²=0
(x-33)(x+33)=0
1) x-33=0
x₁ = 33
2) x+33=0
x₂= -33
ответ: {- 33; 33}
б) x²-144=0
x²-12² = 0
(x-12)(x+12) = 0
1) x-12 = 0
x₁ = 12
2) x+12 = 0
x₂ = -12
ответ: {- 12; 12}
