Additional maths fsmq question
The equation where x^3 - 3x + k = 0, where k is a constant, has a root x=2.
Find the numerical value(s) of the other roots of this equation.
*any help would be much appreciated
*
Find the numerical value(s) of the other roots of this equation.
*any help would be much appreciated
*Original post by machau
The equation where x^3 - 3x + k = 0, where k is a constant, has a root x=2.
Find the numerical value(s) of the other roots of this equation.
*any help would be much appreciated*
Find the numerical value(s) of the other roots of this equation.
*any help would be much appreciated
*sub x=2 into the equation to find k, then factorize as
(x-2)*quadratic
And solve for the roots of the quadratic.
Original post by mqb2766
sub x=2 into the equation to find k, then factorize as
(x-2)*quadratic
And solve for the roots of the quadratic.
(x-2)*quadratic
And solve for the roots of the quadratic.
Thanks, that makes sense 😊
(edited 4 years ago)
Original post by machau
Thanks, but how do I find the quadratic?
Either do polynomial division or write it as
ax^2 + bx + c
And multiply by (x-2) and equate to the cubic.
Original post by mqb2766
Either do polynomial division or write it as
ax^2 + bx + c
And multiply by (x-2) and equate to the cubic.
ax^2 + bx + c
And multiply by (x-2) and equate to the cubic.
Okay, thanks
Quick Reply
Related discussions
- How many GCSEs are you getting?
- Finished your GCSE’s?
- How much do GCSE grades matter for Imperial ?
- Learn lots of maths fast
- A level choices
- Investing in my future 🤎
- is further maths right for me?
- Do you think I have a good shot at Cambridge?
- Fsmq ocr additional maths 23 jun 2023
- LSE Economics L100 2024 Entry
- gyg- the gcse grind begins....
- What are T Levels?
- GCSE
- a level choices for biochemistry/biology
- A-Level Choices - Further Maths
- Cambridge L100 Economics - TMUA to Interview
- How many GCSEs is 'normal'?
- Welcome to the GCSE forum!
- is lse economics and oxford ppe out of the question due to my gcse grades
- Warwick Economics (L100) offer holders
Latest
Trending
Last reply 3 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
Trending
Last reply 3 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
