а) (x+3)² = x² + 23x + 3² = x² + 6x + б) (2-y)² = 2² - 22y + y² = 4 - 4y + y²
a) 2832 = (30-2)(30+2) = 30² - 2² = 900 - 4 = 89б) 6773 = (70-3)(70+3) = 70² - 3² = 4900 - 9 = 4891
Уравнение3(x+1)(x-1) = 2(x-2)(x+23(x²-1) = 2(x²-43x² - 3 = 2x² - x² = x = ±√5
а) (x+3)² = x² + 23x + 3² = x² + 6x +
б) (2-y)² = 2² - 22y + y² = 4 - 4y + y²
a) 2832 = (30-2)(30+2) = 30² - 2² = 900 - 4 = 89
б) 6773 = (70-3)(70+3) = 70² - 3² = 4900 - 9 = 4891
Уравнение
3(x+1)(x-1) = 2(x-2)(x+2
3(x²-1) = 2(x²-4
3x² - 3 = 2x² -
x² =
x = ±√5