Register

2. Confirm that 1 + V5 and 1 - V5 are the correct roots for x^2 - 2x - 4 = 0.

2. Confirm that 1 + V5 and 1 - V5 are the correct roots for x^2 - 2x - 4 = 0.
78.5k views
4 votes
2. Confirm that 1 + V5 and 1 - V5 are the correct roots for x^2 - 2x - 4 = 0.

User ColinD
by
7.6k points

1 Answer

4 votes

Answer:

Explanation:


{\displaystyle \Delta =b^(2)-4ac} (for this equation b=-2 ; a=1 ; c=-4 )</strong></p><p></p><p>Δ= (-2)^2-4*(-4)*1=4+16=20</p><p>√(20) =2√(5) </p><p>x_(1)=(2+2√(5) )/(2) = (2(1+√(5)) )/(2) =1+\sqrt{5</p><p>x_(2)=(2-2√(5) )/(2) = (2(1-√(5)) )/(2) =1-\sqrt{5

User Robert Almgren
by
8.6k points
← Prev Question Next Question →

Related questions

User Subrob Sugrobych
asked Jul 7, 2021 141k views
2. Confirm that 1+V5 and 1 - V5 are the correct roots for x2 – 2x – 4 = 0.
Subrob Sugrobych asked Jul 7, 2021
by Subrob Sugrobych
8.1k points
1 answer
5 votes
141k views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories

Other Questions

How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
Link Copied!