Get the first move right and the rest follows
To solve the following equation :
First multiply through by 4a :
Complete the square within the square brackets :
Square-root both sides :
And the well-known formula is there for the taking.
M500 : The Open University's mathematics magazine.
Staff INSET presentation at Shrewsbury School.
All images, text and file downloads © 2004 - 2012, The MathMagical Software Company.