equations
- Created by: 10carterj
- Created on: 08-06-14 16:44
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- equations
- factorising
- putting back into brackets
- example
- answer
- (x+2)(x+1)
- x2+3x+2
- answer
- example
- putting back into brackets
- solving
- usually finding x=0
- so find the values in the brackets
- and make them equal o
- so..
- (x+2)(x+1)
- x=-2 and x=-1
- so..
- and make them equal o
- so find the values in the brackets
- usually finding x=0
- quadratic
- quadratic formula
- the formula helps to find two values for x that makes it equal 0
- the formula
- ax2+bx+c=0
- so....
- 4x2-x-6=0
- using the equation...
- a=-4, b=+1 and c=+6
- using the equation...
- 4x2-x-6=0
- so....
- ax2+bx+c=0
- the formula
- the formula helps to find two values for x that makes it equal 0
- quadratic formula
- nth term
- the difference between all the terms is the n value. and the difference between the values and the multiplication table of the n vaue is the end part
- sine cosine rules
- the sine rule
- cosine rules
- a2=b2+c2-2bc cosA
- length
- a2=b2+c2-2bc cosA
- shapes
- areas
- surface
- sphere
- sa=4*pi*r
- cone
- sa=pi*r*l+pi*r2
- cylinder
- sa=2*I*r*h+2*pi*r2
- sphere
- 2d
- trapezium
- A=b*h
- parellelogram
- A=1/2(a+b)*h
- triangles
- A=1/2*b*h
- circles
- length of arc
- L=x/360*circumference of full circle
- area of a sector
- A=x/360*area of full circle
- area and circumference
- area=pi*r2
- circumference=pi*d
- or circumference=2*pi*r
- length of arc
- trapezium
- surface
- volumes
- volume of a prism
- v=cross section area*L
- volume of cuboids
- v=L*w*h
- volume of a cylinder
- v=pi*r2*h
- volume of spheres
- v=4/3*pi*r3
- volumes of pyramids and cones
- volume of cones
- 1/3*pi*r2*h
- volume of pyramids
- v=1/3*base area*vertical height
- volume of cones
- volume of a prism
- areas
- factorising
- r=radius, d=diameter
- v=volume, w=width
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