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Slide 2

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The methods,
Easy
Factorising
Completing the square
Little difficult
Using the formula…read more

Slide 3

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Factorising
This is the most simple one and it is the most quickest way.
Add
Solve:
Multiply
X 2 + 4x -32 = 0 1, Factorise
2. Make sure each
bracket equals to
zero.
(x+8 ) (x-4)= 0 3.Solve the equation.
X +8 = 0 x- 4 = 0
X = -8 x=4
If this hasn't worked, go to the next slide for another method...…read more

Slide 4

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Completing the square
Solve:
X 2 + 4x -3 = 0
Use the square Half it and here is the square.
x +2
(x+2)2 -4 -3 = 0
x x2 +2x (x+2)2-7=0
(x+2)2 = 7
Don't need it so take it away. X+2 = + and - root 7
+2 +2x +4
X = + root 7 -2
X = - root 7 -2
Can leave it in surd form
on the non calculator.…read more

Slide 5

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Using the quadratic formula *On the formula sheet*
(b2-4ac)
X= -b +-
2a
Divide all of
it by 2a
ax + bx + c = 0
2x2+ 11x +5 =0
-11+- 112 (4x2x5)
A=2 (2x2)
B = 11
C=5 -11+- 121-40
4
-11 +- 81
4
-11 +- 9
4
X = -11+ 9 -2 = 1 x = -11-9 = -20 =-5
4 4 2 4 4…read more

Comments

Sunset


Useful , but it would help if you explained some of the numbers that appear. It took me a while to work out where some of them came from.

Bethany Cunningham

Sorry about that Sunset. I apologise for any unclear sections but it was 3 years ago I completed GCSE maths and have no concern in fixing this. Sorry. It helped me get an A* so hopefully it will help others. If you need help, please seek other sources.

Good luck!

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