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IDENTITIES
If in two algebraic expressions which contain
letters, for all real numbers which settle instead
letters, they are equal to each other then, this
equality called Algebraic Identity.
( x + y)u = xu + yu
x
u
y
A
CB C
F
E
Area of rectangle ABEF = xu
Area of rectangle ECDF = yu
Area of rectangle ABCD = Area of rectangle ABEF + Area of rectangle ECDF
Ie, (x + y)u = xu + yu
D
(x+y)(u+v) = xu+xv+yu+yv
xv yv
xu yu
B
C
A D
x y
u
v
Area of rectangle AGIE = xv
Area of rectangle GBFI = xu
Area of rectangle FCHI = yu
Area of rectangle EDHI = yv
Area of rectangle ABCD = Area of rectangle AGIE + Area of rectangle GBFI
+ Area of rectangle FCHI+Area of rectangle EDHI
Ie, (x + y)(u + v) =xu + xv + yu + yv
F
E
G H
I
Identity

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Identity

  • 1.
  • 3. If in two algebraic expressions which contain letters, for all real numbers which settle instead letters, they are equal to each other then, this equality called Algebraic Identity.
  • 4. ( x + y)u = xu + yu x u y A CB C F E Area of rectangle ABEF = xu Area of rectangle ECDF = yu Area of rectangle ABCD = Area of rectangle ABEF + Area of rectangle ECDF Ie, (x + y)u = xu + yu D
  • 6. xv yv xu yu B C A D x y u v Area of rectangle AGIE = xv Area of rectangle GBFI = xu Area of rectangle FCHI = yu Area of rectangle EDHI = yv Area of rectangle ABCD = Area of rectangle AGIE + Area of rectangle GBFI + Area of rectangle FCHI+Area of rectangle EDHI Ie, (x + y)(u + v) =xu + xv + yu + yv F E G H I