2a² = 5a – 3 and 2b² = 5b – 3. What is the number value of a² + b² ?
Sayantan Garai , 5 Years ago
Grade 10
Discuss with Askiitians Tutors> 2a² = 5a – 3 and 2b² = 5b – 3. What is th...
3 Answers
Arun
Last Activity: 5 Years ago
Dear student
x^2 – 5 x + 3 = 0 has roots a and b.
hence a^2 + b^2 = (a + b)^2 – 2 ab = 25 – 6 = 19
Hope it helps
Regards
Arun
Aditya Gupta
Last Activity: 5 Years ago
hello sayantan, aruns ans is wrong.
note that a and b are roots of eqn 2x^2 – 5x+3= 0
so a^2 + b^2 = (a + b)^2 – 2 ab = 25/4 – 2*3/2
= 13/4
kindly approve :)
Arun
Last Activity: 5 Years ago
Dear student
Sorry, I forgot to take 2 in consider
it is 2x^2 – 5x + 3 = 0
now a^2 + b^2 = (a + b)^2 – 2ab = 25/4 – 3 = 13/4
Thanks Aditya for making me correct
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free
Enter text here...
Other Related Questions on Discuss with Askiitians Tutors
Please send the full solution as soon as possible 🙏
Discuss with Askiitians Tutors
1 Answer Available
Last Activity: 2 Year ago(s)
I got 80% in jee mains and am from sc category . Will i get a good NIT
Discuss with Askiitians Tutors
1 Answer Available
Last Activity: 2 Year ago(s)
Looking for an integrated JEE+NEET Coaching Classess for 2 years along with an ongoing normal syllabus related classes followed by regular revision tests, please.ThanksGopinath [F/O Class 10th Student-Qatar]
Discuss with Askiitians Tutors
0 Answer Available
Last Activity: 2 Year ago(s)
Ntse coaching for class 9 ncert student, fee and schedule
Discuss with Askiitians Tutors
1 Answer Available
Last Activity: 2 Year ago(s)
Can a class 9 student take admission in the course, 2- what is the duration and mode of full course ie how many student in one class.
Discuss with Askiitians Tutors
0 Answer Available
Last Activity: 2 Year ago(s)