How to solve the quadratic using factoring

Question

How to solve the quadratic using factorin: 21X*2+X=2

Answer 1

21x² + x = 2             subtract 2 from both sides

21x² + x - 2 = 0        factor using FOIL

(3x + 1)(7x - 2) = 0  

 

3x + 1 = 0

3x = -1

x = -1/3

 

or 

 

7x - 2 = 0

7x = 2

x = 2/7

 

{-1/3, 2/7}