Solve 5x^2 = 10x + 4 Give your answers to 2 decimal places. [4 marks]

5x^2 = 10x + 4 5x^2 - 10x = 4 5x^2 - 10x - 4 = 0 ax^2 +bx +c = 0 x = (-b (+/-) ( b2 -4ac)1/2) /(2a) x = (--10 (+/-) ((-10)2- (4 x 5 x -4))1/2)/(2 x 5) x = (10 (+/-) (100 + 80)1/2)/10 x = (10 (+/-) (180)1/2 )/10 x = 2.341(...) and –0.341(...) x= 2.34 and –0.34 (to 2.d.p)

Answered by JOSHUA T S. Maths tutor

5214 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the follow simultaneous equation:4x + y= 4 and 2x + y= 8


Given point A: (5,9), point B: (d,15) and the gradient of line AB is 3... what is the value of d?


What is the equation of the straight line passing through the points (2,3) and (3,5)?


Find a quarter of the area of a circle with a diameter of 10cm.


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 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences