Question

Simplify (3x+1)^2-(3x-2)(3x+1)​

Answer 1

Answer:

(3x-1)^2 - (3x-2)(3x+1)

= 9x^2 - 6x + 1 - (9x^2 + 3x - 6x -2)

= 9x^2 - 6x + 1 - 9x^2 - 3x + 6x + 2

= -3x + 3

 

If this was an equation (3x-1)^2 - (3x-2)(3x+1) = 0,

in that case we can find the solution of this equation by

-3x + 3 = 0

x = 1