Solve the quadratic equation: 5x2+8x+2

Here you need to use the quadratic formula, it cannot be solved by expanding out the brackets. In the formulae for which can be found on the formulae sheet. In this case a=5, b=8 and c=2.

This gives: x=(-8±√(82-(4x5x2)))/(2x5)

This simplifies to x=(-8±√24)/10

The plus or minus sign shows there are two possible solutions.
For x=(-8+√24)/10, x=0.3
For x=(-8-√24)/10, x=-1.3

LP
Answered by Liam P. Maths tutor

4274 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

3x+5y=7 and 9x+11y=13. Solve to find the values of x and y that satisfy both equations.


Simplify √48


Calculate the area of a sector which has an acute angle of 30 degrees and a radius of 5cm.


solve 6(x + 4) = 2x -4


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