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1055578
Quadratic Expansions
Description
NCEA L2/3 Calculus and Chemistry (Algebra) Mind Map on Quadratic Expansions, created by Olivia McKenzie on 07/07/2014.
No tags specified
algebra
calculus and chemistry
algebra
ncea l2/3
Mind Map by
Olivia McKenzie
, updated more than 1 year ago
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Created by
Olivia McKenzie
over 10 years ago
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Resource summary
Quadratic Expansions
Two brackets
(x+2)(x-5)= x2-5x+2x-10
= x2-3x-10
(x+7)(x+2)
= x2+2x+7x+14
= x2+9x+14
Three Brackets
(x+1)(x+2)(x-3)=(x+1)[(x2-x-6)]
= x3-x2-6x+x2-x-6
= x3-7x-6
(x+2)(x+5)(x+3)
= (x+2)[(x2+8x+15)
= x3+8x2+15x+2x2+16x+30
= x3+10x2+31x+30
Perfect Squares
(x+4)2
= (x+4)(x+4)
= x2+8x+16
(x+2)2
= (x+2)(x+2)
x2+4x+4
Difference between two squares
(x+5)(x-5)
= x2+5x-5x-25
= x2-25
(x+3)(x-3)
= x2+3x-3x-9
= x2-9
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