9a^2+4+12a = (3a+2)²= (3a+2)*(3a+2)
9a^5b^4-18a^3b^3 = 9a³b³*(a²b-2)
6a^2(a-5)-a(a-5) = (a-5)*(6a²-a)= a*(6a-1)*(a-5)
8(x-9)-b(9-x) = 8(x-9)+b(x-9)= (x-9)*(8+b)
ax-3x-4a+12= x(a-3)-4(a-3)= (a-3)*(x-4)
9a^2+4+12a = (3a+2)²= (3a+2)*(3a+2)
9a^5b^4-18a^3b^3 = 9a³b³*(a²b-2)
6a^2(a-5)-a(a-5) = (a-5)*(6a²-a)= a*(6a-1)*(a-5)
8(x-9)-b(9-x) = 8(x-9)+b(x-9)= (x-9)*(8+b)
ax-3x-4a+12= x(a-3)-4(a-3)= (a-3)*(x-4)