Explicación paso a paso:
a) 4x + 12 = 4(x+3)
b) 8mx- 24my +16mz = 8m( x - 3y + 2z)
c) 21abc - 35ab -14mb = 7b ( 3ac - 5a - 2m)
a) m² - 25 = (m+5) (m-5)
b) 25x² - 36y² = (5x)² - (6y)²= (5x + 6y) (5x - 6y)
c) 1/9m² - 1 = (1/3m)² - 1² = (1/3m - 1 ) ( 1/3m + 1)
