Algebramedium · Past Paper
If α and β are roots of 2x^2 - 4x + 1 = 0, find α + β + αβ.
A2.5
B1.5
C2
D4.5
✓ Correct Answer: A — 2.5
α+β = 4/2 = 2. αβ = 1/2 = 0.5. Sum is 2 + 0.5 = 2.5.
Share this question
More from Algebra
- The root of 2x + 8 = 2 is:
- A number decreased by 10 is 5. What is the number?
- The product of two consecutive integers is 20. Find the integers.
- Five years ago, a father's age was 7 times his son's age. Five years hence, the father's age will be 3 times his son's age. Find the father's present age.
- If x/y = 2/3 and x + y = 10, find x.