Question

Urgenttt dau 50 de puncte si coroana
fara 2.

Answer 1

3)

x² - 4 = (x - 2)(x + 2)

1 - a² = (1 - a)(1 + a)

x² - 25 = (x - 5)(x + 5)

x² - 4y² = (x - 2y)(x + 2y)

x² - 100 = (x - 10)(x + 10)

144 - x² = (12 - x)(12 + x)

9x² - 64y² = (3x - 8y)(3x + 8y)

25 - 9a²b² = (5 - 3ab)(3 + 3ab)

4)

x² + 2·x·√3 + (√3)² = (x + √3)²

x² - 2·x·√5 + (√5)² = (x - √5)²

x2 + 2√6x + 6 = (x + √6)²

a² - 2√3a + 3 = (a - √3)²