Question

fatore:

a: x³-xy²


b: 3a²+18a+27


c: 5a²-10ab+5b


d: a²-2ab+b²

Answer 1

a) x³ - xy²
    x·(x² - y²) = x·(x + y)(x - y)

b) 3a²+18a+27
    3·(a² + 6a + 9) = 3·(a + 3)²  ou  3·(a + 3)(a + 3)

c) 5a²-10ab+5b²
   5·(a² - 2ab + b²) = 5·(a - b)²  ou  5·(a - b)(a - b)

d) a²-2ab+b²
    (a - b)² = (a - b)·(a - b)