# The quadratic equation in x is x2 + 2x.cos(A) + K=0. &also given summation and difference of solutions of above equation are -1 & -3 respectively. Hence find K & A?

##### 1 Answer

May 5, 2018

#### Explanation:

Let the solutions of the quadratic equation be

We also know that

Simplify and solve,

Substitute

Using the difference and sum of roots,

When

When the roots are

By comparison,