you first have to move the 168 to the left so you subtract it to both sides 4w^2+4x+1-168=0 then you combine the 1 and -168 4x^2+4x-167=0 then you could use the quadratic formula to solve for x -b(+or -)squareroot(b^2-4ac) all divided by 2a a=4 b=4 c=-167
