Difference of squares
(a+b)(a-b) = a2 - b2
Identities and Equations
2x+x=3x is an identity because it is true for all values of x
2x+1=3 is an equation because it is only true for x=1
If an equation contains fractions,then you cross-multiply to remove the brackets.
- A quadratic graph is called a parabola
- A parabola has a vertical line of symmetry and is infinite
- Cubic graphs have x3 as the highest power and will look similar to this
The equation of a straight line is y=mx+c where m is the gradient and c is the y intercept
If the gradient of a straight line is m,the gradient of the line perpendicular to m is -1/m
Standard index form
End of this topic!
Drafted by Gina (Mathematics)