Question

I completely forgot how to factor an expression. Please helps. Thanks:)
Here is an example problem- 28x+12

Answer 1

- 28x+12 = 0
subtract both sides by 12
 28x+12 - 12 = 0 - 12
simplify
28x = -12
divide both sides by 28
 28x/28 = 12/28
simplify
x = 3/7

Answer 2

Your answer is 4(7x+3)