Question

Разложите на множители
1)xy+3y+xz+3z
2)25-c²
3)ab²-2abc+ac²

Answer 1

1)xy+3y+xz+3z = y(x+3) + z(x+3) = (y+z)(x+3)
2)25-c² = 5²-c² = (5-c)²
3)ab²-2abc+ac² = a(b²-2bc+c²) = a(b-c)²