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VINS

bonjour

( x - 1 )² = x² - 2 x + 1

( x + 2 ) ( x - 2 ) = x² - 4

4 x² + 12 x + 9 = ( 2 x + 3 )²

Bonjour,

A= a²-2ab +b²

a= x

b= 1

a² = x²

b² = 1

A= x² -2x +1

B=

a² -b²

a = x

b= 2

a² = x²

b² = 4

B= a²-4

C=

(a+b) (a+b) = a² +2ab +b²

a² =4x²

b² = 9

a= 2x

b= 3

C= (2x+3)²

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