# Core

- Created by: Pearl Desai
- Created on: 08-02-14 14:43

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- Core
- Circles
- x = x + x /2
- y = y + y /2
- The perpendicular bisector of the chord AB, which intersects AB at the midpoint M, passes through the centre of the circle, O.
- Equation of circle
- (x-a) +(y-b) = r
- x + y = r

- tangent to the circle = one solution
- intersects the circle at 2 points = two solutions
- doesn't interssect or touch the line = no solutions

- Logarithms
- y = log x
- log a = 1
- log 1 = 0
- Laws
- log (xy) = log x + log y
- log (x ) = nlog x

- Factor Theorms
- (ax - b) is a factor of f(x)
- x - ax + x + 6 / x - a

- Circles

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