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Mira1Lyna
@Mira1Lyna
May 2019
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Bonjour c très urgent svp aider moi
1) Développer et réduire l'expression A= (3x+1)²-(x+1)(x-3)
2) Factoriser l'expression B= 25x²-4+(5x+2)(x+1).
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Bonsoir
A = ( 3 x + 1 )² - ( x + 1) ( x - 3)
A = 9 x ² + 9 x + 1 - ( x² - 3 x + x - 3)
a = 9 x² + 9 x + 1 - x² + 3 x - x + 3
A = 8 x² + 8 x + 4
B = ( 5 x - 2 ) ( 5 x + 2) + ( 5 x + 2) ( x + 1)
= ( 5 x + 2) ( 5 x - 2 + x + 1)
=
( 5 x + 2) ( 6 x - 1 )
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nadiab
Bonsoir,
1) Développer et réduire l'expression A= (3x+1)²-(x+1)(x-3)
A= 8x²+8x+4
2) Factoriser l'expression B= 25x²-4+(5x+2)(x+1)
B= (5x-2)(5x+2)+(5x+2)(x+1)
B= (5x+2)(5x-2+x+1)
B= (5x+2)(6x-1).
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A = ( 3 x + 1 )² - ( x + 1) ( x - 3)
A = 9 x ² + 9 x + 1 - ( x² - 3 x + x - 3)
a = 9 x² + 9 x + 1 - x² + 3 x - x + 3
A = 8 x² + 8 x + 4
B = ( 5 x - 2 ) ( 5 x + 2) + ( 5 x + 2) ( x + 1)
= ( 5 x + 2) ( 5 x - 2 + x + 1)
= ( 5 x + 2) ( 6 x - 1 )
1) Développer et réduire l'expression A= (3x+1)²-(x+1)(x-3)
A= 8x²+8x+4
2) Factoriser l'expression B= 25x²-4+(5x+2)(x+1)
B= (5x-2)(5x+2)+(5x+2)(x+1)
B= (5x+2)(5x-2+x+1)
B= (5x+2)(6x-1).