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

DS
Answered by Darragh S. Maths tutor

3761 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve x^2 -4x=12


Use approximations to 1 significant figure to estimate the value of 0.101 x (51.2)^2 / (3.96)^1/2


Solve the equation 3(x+1) = 21


In a stack of CDs, there are 3 types: Rock, Pop and Jazz. There are 2 Rock CDs, x Pop CDs, and (2x+5) Jazz CDs. A CD is chosen at random. If the probability it is Rock is 1/20, work out the probability it is Jazz.


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