Question

помогите
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Answer 1

1) 7x³ – 63x = 0

7x(x² – 9) = 0

7x(x – 3)(x + 3) = 0

x₁ = 0; x₂ = 3; x₃ = –3

2) 49x³ – 14x² + x = 0

x(49x² – 14x + 1) = 0

x(7x – 1)² = 0

x₁ = 0; x₂ = 1/7

3) x³ – 5x² – x + 5 = 0

x²(x – 5) – (x – 5) = 0

(x² – 1)(x – 5) = 0

(x – 1)(x + 1)(x – 5) = 0

x₁ = 1; x₂ = –1; x₃ = 5