Solve the following algebraic equation: x^2 + 6x + 9 = 0

I would explain on the whiteboard how to factorise itleading them to having two brackets, (x + 3) and (x+3). Could also be written as (x+3)^2then teach them on whiteboard how to solve the equation(x+3)^2 = 0hence x+3 = 0hence x = -3OR-(x+3) = 0-x -3 = 0x + 3 = 0so again, x = -3So, the solution is x = -3would use whiteboard to explain all this

Answered by Isabella J. Maths tutor

1393 Views

See similar Maths KS3 tutors

Related Maths KS3 answers

All answers ▸

How do I expand 2 sets of brackets to make a quadratic?


Use Pythagoras theorem to work out the hypotenuse when the adjacent length of a triangle is 3 and the opposite side is 4.


Asha and Lucy sell pencils. Asha sold 7 boxes, and 22 singles. Lucy sold 5 boxes, and 2 singles. Given Asha sells twice as many pencils as Lucy, work out how many questions are in each box.


Expand and simplify (3x + 5)(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