Question

QUEM SABE ESSA.. MOLEEEE... Fator comum SOCORRO  gentee...    A) 3$a^{4}$ - 12$a^{8}$ = ?? 
B) $a^{2}$ $x^{2}$ + 2$a^{3}$ $x^{4}$ - a $x^{5}$ = ?? 
C)  a² + ab - ac +ab = 
 D) 6$x^{4}$ - 18 $x^{3}$ - 12 $x^{2}$ =
 E) ab - an+ bm-mn = ?? 
F) xy + 2x - 2y-4 = ??
 G) $x^{2}$ (x +2) +6(x+2) = 

Answer 1

$\boxed{3a^4-12a^8=3a^4(1-4a^2)} \\ \\ \boxed{a^2x^2+2a^3x^4-ax^5=ax^2(a+2ax^2-x^3) } \\ \\ \boxed{a^2+ab-ac+ab=a(a+b-c+b)=a(a+2b-c)} \\ \\ \boxed{ab-an+bm-mn=a(b-n)+m(b-n)=(b-n)(a+m)} \\ \\ \boxed{xy+2x-2y-4=x(y+2)-2(y+2)=(y+2)(x-2)} \\ \\ \boxed{x^2(x+2)+6(x+2)=(x+2)(x^2+6)}$