# For a certain equation, #a, b, c# belongs to real numbers. #ab > 0# and #a+2b+4c=0#. Then, the equation #ax^2+bx+c=0# has what kind of roots (one +ve & one -ve, both +ve or both -ve) ? Thank you!

##### 1 Answer

Nov 28, 2016

See below.

#### Explanation:

Putting

so if