Solve 2x^2+ 7x -8 = 0, giving your answer to 2 decimal places.

You can solve this equation using the quadratic formula: x = -b +/- root(b2- 4ac) 2aSo, a=2, b=7, c=-8:x = -7 +/- root(72- 4 x 2 x -8) 2 x 2So, x = 0.31 or -3.81

Answered by Michelle K. Maths tutor

7281 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How to solve simultaneous equations?


How do I expand out a pair of brackets?


Find the value of roots of the quadratic: x^2-13x=30


John has twin sisters. The sum of the ages of John and his twin sisters is 39. In 4 years’ time the twins will be 18. How old will John be in 4 years’ time?


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