Factor completely: 5x(x + 3) + 6(x + 3)
Can some one please help. i dont understand it at all

Question

Factor completely: 5x(x + 3) + 6(x + 3)
Can some one please help. i dont understand it at all

hero · Answer

Hint: 

ba + ca = a(b+c)

In this case, a = (x + 3)

anonymous · Answer

eq. is 5x^2+15x+6x+18

hero · Answer

@deadman340 , we're trying to factor completely here.

hero · Answer

Similar Example: 

1. Recognize that we have two terms and x + 7 is the common expression:
2x(x + 7) + 3(x+7)

2. Factor out x + 7 by way of distributive rule: 


a = (x+7) 
b = 2x
c = 3

Since ab + ac = a(b+c)

Therefore: 
2x(x+7) + 3(x+7) = (x+7)(2x + 3)

3. That's it


Okay, your turn.