how alpha square + betasquare=alpha plus beta the whole square -2 alpha beta
Answers
Answered by
3
this is as follows..
according to the identity..
(a+b)²=a²+b²+2ab
by shifting 2ab on the right side we get...
a²+b²=(a+b)²-2ab.....(sign changes )....ans.
according to the identity..
(a+b)²=a²+b²+2ab
by shifting 2ab on the right side we get...
a²+b²=(a+b)²-2ab.....(sign changes )....ans.
Khubugupta:
thanq so much
most welcome!
Answered by
1
Hey!!!
let alpha = x
and beta = y.
Your question how x² + y² = (x + y)² - 2xy
RHS = (x + y)² - 2xy
=> RHS = x² + y² + 2xy - 2xy
=> RHS = x² + y²
=> RHS = LHS
Hence Proved
Hope this helps
let alpha = x
and beta = y.
Your question how x² + y² = (x + y)² - 2xy
RHS = (x + y)² - 2xy
=> RHS = x² + y² + 2xy - 2xy
=> RHS = x² + y²
=> RHS = LHS
Hence Proved
Hope this helps
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