Question

1.Fatore as Expressões
a) ab - 3a + 2b - 6
b) 14bx + 7by + 2ax - by
c) 6ab - 3b + $a^{2} b^{2}$
d) 6$a^{4}$ + 3$a^{3}$ + 12$a^{2}$
2. Desenvolva os produtos
a) $(5x + 2)^{2}$
b) $(x - 3)^{2}$
3.Fatore
a) $\frac{a}{4}^{2}$ + $\frac{6a}{4}$ + 9
b) $(\frac{a}{4}^{2}$ - $\frac{2ab}{15}$ + $\frac{b}{25}^{2})$

Answer 1

1 - 
a) ab - 3a + 2b - 6 =
    a(b -3) + 2(b -3) =
    (a +2b).(b-3)²

b) 14bx + 7by + 2ax - by =
    14bx + 2ax +7by -by =
    2x(7b +a) + b(7y -y)
 
c) 6ab - 3b =
    3b(2a -1)

d) 6 + 3 + 12 =
    9 + 12 =
    21

2.
a) (5x +2)² =
     25x² + 2.5x.2 + 2² =
     25x² + 20x + 4

b) (x -3)² =
     x² - 2.x.3 + 3² =
     x² -6x +9

3.
a) a²/4 +6a/4 +9 =  mmc 4
    1.a²/4 + 1.6a/4 + 4.36/4 =
    a² + 6a + 144