YarikGood1 1. c)
2. а)
3. (3x + 4)² - 9(x + 2) = 22
9x² + 24x + 16 - 9x² - 18x = 22
6x + 16 = 22
6x = 22 - 16
6x = 6
x = 6 / 6
x = 1
d)
4. y(y - 1)(y + 2) = 0
y(y - 1)(y + 1 + 1) = 0
y = 0, или y - 1 = 0, или y + 1 + 1 = 0
y = 0         y = 1              y = -2
d)
5. (a + b)(a - b) + (a + b)² - a(a + 2b) = a² - b² + a² + 2ab + b² - a² - 2ab = a²
d)