Write the equation x^2 + 6x - 40 = 0 in the form (x + a)^2 - b = 0 and then solve for x

(x2 + 6x + 9) - 49 = 0
(x + 3)2 - 49 = 0

then to solve

(x + 3)2 = 49
x + 3 = +-7
x = -10 or x = 4

Answered by Darragh S. Maths tutor

3524 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Expand (x-5)(2x-3)


y is inversely proportional to d^2 and when d = 10, y = 4. d is directly proportional to x^2 and when x = 2, d = 24. Find a formula for y in terms of x. Give your answer in its simplest form.


Solve the quadratic equation 3x^2 + x – 5 = 0 give answers to 3 decimal places


Solve the simultaneous equations: 5x + y = 21, x - 3y = 9


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