Question

Даю 50 балів!!!
алгебра допоможіть!!!!
завдання номер 2 і номер 3​

Answer 1

Спростити

1.1) 4a - 4c + ac - a²

4(a - c) - a × (-c + a)

(a - c) × (4 - a)

Якщо а = 3,5; с = -1,5; то, (3,5 - (-1,5)) × (4 - 3,5) = 2,5

2.1) 5x³ - 20x = 0

5x × (x² - 4) = 0

x × (x² - 4) = 0

x² - 4 = 0; x = 0;

x = 0; x = -2; x = 2;

x1 = -2; x2 = 0; x3 = 2;

2) 25x³ - 10x² + x = 0

x × (25x² - 10x + 1) = 0

x × (5x - 1)² = 0

x = 0; (5x - 1)² = 0;

x = 0; x = 0,2;

x1 = 0; x2 = 0,2;

3) x³ - 5x² - x ÷ 5 = 0

x² × (x - 5) - (x - 5) = 0

(x - 5) × (x² - 1) = 0

x - 5 = 0; x² - 1 = 0;

x1 = -1; x2 = 1; x³ = 5