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Rhizlanemaha
@Rhizlanemaha
May 2019
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Bonjour c'est pour demain svp ! Factoriser les expression suivantes :
A= x²- 49
B= 4x²- 25
C= x²- 22x +121
D=9x² + 30x + 25
E= (x - 3)² - 16
F= 4 (x - 1)² - 81
G= (3x - 7)² - (x+2)²
H= (5+x)² - 36x²
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Bonjour,
Rappel :
( a+b )² = a² + 2ab + b²
( a-b )² = a² - 2ab + b²
( a+b )( a-b ) = a² - b²
A = x² - 49
A = x² - 7²
A = ( x+7 )( x-7 )
B = 4x² - 25
B = ( 2x )² - 5²
B = ( 2x+5 )( 2x-5 )
C = x² - 22x + 121
C = x² - 2×11x + 11²
C = ( x-11 )²
D = 9x² + 30x + 25
D = ( 3x )² + 2×5×3x + 5²
D = ( 3x+5 )²
À toi de faire les suivants.
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Bonjour
a = ( x - 7) ( x + 7)
b = ( 4 x - 5) ( 4 x + 5)
c = ( x - 11)²
d = ( 3 x + 5)²
e = ( x - 3 - 4) ( x - 3 + 4) = ( x - 7) ( x + 1)
je te laisse continuer, ce sont toutes des identités remarquables
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Bonjour,Rappel :
( a+b )² = a² + 2ab + b²
( a-b )² = a² - 2ab + b²
( a+b )( a-b ) = a² - b²
A = x² - 49
A = x² - 7²
A = ( x+7 )( x-7 )
B = 4x² - 25
B = ( 2x )² - 5²
B = ( 2x+5 )( 2x-5 )
C = x² - 22x + 121
C = x² - 2×11x + 11²
C = ( x-11 )²
D = 9x² + 30x + 25
D = ( 3x )² + 2×5×3x + 5²
D = ( 3x+5 )²
À toi de faire les suivants.
a = ( x - 7) ( x + 7)
b = ( 4 x - 5) ( 4 x + 5)
c = ( x - 11)²
d = ( 3 x + 5)²
e = ( x - 3 - 4) ( x - 3 + 4) = ( x - 7) ( x + 1)
je te laisse continuer, ce sont toutes des identités remarquables