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

MK
Answered by Michelle K. Maths tutor

7732 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

There are two points 'A' and 'B' on a graph, their coordinates are (0,1) and (10,6) respectively. 1)Find the equation of the line that runs through both of these points.2)Find the equation of a line perpendicular to this through point 'B'.


Simplify (3x^2 - 15x)/(3x^2 - 13x -10)


express 63 as a product of its prime factors


Solve the simultaneous equations: 2x+2y = 10 and 7x + 4y = 26


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning