Question

решите точто в квадратике

Answer 1

1. а) 75 - 3a² = 3(25 - a²) = 3(5 - a)(5 + a)
б) 3x² + 12x + 12 = 3(x² + 4x + 4) = 3(x + 4)²

2. (3 + x)(x - 3) - (3 - x)² = x² - 9 - (9 - 6x + x²) = x² - 9 - 9 - x² + 6x = 6x - 18

4. 37² + 2·37·13 + 13² = (37 + 13)² = 50² = 2500