What is the sum of the roots of the quadratic equation ?

Answer and explanation

Correct answer: B. 5

  1. Step 1: Apply Vieta's formulas for quadratic : the sum of roots is .
  2. Step 2: Substitute and : .
Answer
5.
Why not the others: '7/2' is the product of the roots (); '-5' forgets to negate ; '-7/2' negates the product.

Practise more Advanced Algebra, Geometry and Data Analysis.

Free questions with an explanation for every one, and full timed Qudurat GAT (Saudi Arabia) mock tests.