i tried to work out this question but i cant make it
find the value of k for which the equation xsquared-2x/4x+7 = k-1/k+1 has roots equal in magnitude but opposite in sign
Ok then...I will give you couple of hints:
1) Do you understand that if you cross multiply and group terms carefully, you will get a quadratic?
2) Do you realize that if a quadratic has "roots equal in magnitude but opposite in sign", then the sum of roots is 0 and thus the coefficient of the linear term in the quadratic is 0?