3y^2 + 10y + 3

3y2 + 10y + 33y2 = 3 * 1(3y + n) * (y + r)n * r = 3 hence to try whole numbers first n = 1 or 3 meaning r = 3 or 1 respectivey * n + 3y * r = 10yif n =1 and r = 3 then equivalent is 10y (correct)as all values work 3y2 +10y + 3 = (3y + 1) * (y + 3)y = -1/3 y = -3Alternative, use formula (-b +/- Sqrt(b2 -4ac))/2awhere ay2 + by + ca = 3 b =10 c = 3 y = -1/3 y = -3

JH
Answered by Jack h. Maths tutor

2859 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

There are 720 boys and 700 girls in a school. The probability that a boy chosen at random studies French is 2/3 The probability that a girl chosen at random studies French is 3/5. Work out the number of students in the school who study French.


How would you convert a recurring decimal to a fraction?


How do you multiply two brackets with two terms in them? For example (2x-3)(x+4)


How can I solve a quadratic equation by factorisation?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences