svp aide moi c'est pour demain a) (2x+3)², b) (2x-3)², c) (2x+5)(2x-3), exercices suivant d) (2x-3)²+(2x+3)², a) A= (x+1)²-9, b) B= (4x+3)²-x +6, c) C= (5x-3)²
Mathématiques
salemwizkid
Question
svp aide moi c'est pour demain
a) (2x+3)²,
b) (2x-3)²,
c) (2x+5)(2x-3),
exercices suivant
d) (2x-3)²+(2x+3)²,
a) A= (x+1)²-9,
b) B= (4x+3)²-x +6,
c) C= (5x-3)²-4x(x+2),
d) D= 2(x+5)+(x+8),
suite
a) A= 4-(5x+1)² ,
b) B= 3(6x+2)-(7
x-3)²,
c) C= ( x+1)²-(x+6)²,
D) d= (2x+1)²-(2x-1)²,
a) (2x+3)²,
b) (2x-3)²,
c) (2x+5)(2x-3),
exercices suivant
d) (2x-3)²+(2x+3)²,
a) A= (x+1)²-9,
b) B= (4x+3)²-x +6,
c) C= (5x-3)²-4x(x+2),
d) D= 2(x+5)+(x+8),
suite
a) A= 4-(5x+1)² ,
b) B= 3(6x+2)-(7
x-3)²,
c) C= ( x+1)²-(x+6)²,
D) d= (2x+1)²-(2x-1)²,
2 Réponse
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1. Réponse maudmarine
a) (2x+3)²
= 4x² + 12x + 9
b) (2x-3)²
= 4x² - 12x + 9
c) (2x+5)(2x-3)
= 4x² - 6x + 10x - 15
= 4x² + 4x - 15
d) (2x-3)²+(2x+3)²
= 4x² - 12x + 9 + 4x² + 12x + 9
= 4x² + 4x² - 12x + 12x + 9 + 9
= 8x² + 18
a) A= (x+1)²-9
A = x² + 2x + 1 - 9
A = x² + 2x - 8
b) B= (4x+3)²-x +6
B = 16x² + 24x + 9 - x + 6
B = 16x² + 24x + 15
c) C= (5x-3)²-4x(x+2)
C = 25x² - 30x + 9 - 4x² - 8x
C = 25x² - 4x² - 30x - 8x + 9
C = 21x² - 38x + 9
d) D= 2(x+5)+(x+8)
D = 2x + 10 + x + 8
D = 2x + x + 10 + 8
D = 3x + 18
a) A= 4-(5x+1)²
A = 4 - (25x² + 10x + 1)
A = 4 - 25x² - 10x - 1
A = - 25x² - 10x + 4 - 1
A = - 25x² - 10x + 3
b) B= 3(6x+2)-(7x-3)²
B = 18x + 6 - (49x² - 42x + 9)
B = 18x + 6 - 49x² + 42x - 9
B = - 49x² + 18x + 42x + 6 - 9
B = - 49x² + 60x - 3
c) C= ( x+1)²-(x+6)²
C = x² + 2x + 1 - (x² + 12x + 36)
C = x² + 2x + 1 - x² - 12x - 36
C = x² - x² + 2x - 12x + 1 - 36
C = - 10x - 35
D) d= (2x+1)²-(2x-1)²
D = 4x² + 4x + 1 - (4x² - 4x + 1)
D = 4x² + 4x + 1 - 4x² + 4x - 1
D = 4x² - 4x² + 4x + 4x + 1 - 1
D = 8x -
2. Réponse sekoudiawara347
a) (2x+3)² = 2²+3² = 4+9 = 13
b) (2x-3)² = 2²-3² = 4-9 = -5
c) (2x+3)²(2x-3)² = (4+9)(4-9) = 4x4 + 4x-9 + 9x4 + 9x-9 = 16 - 36 + 36 - 81 = - 65
exercice suivant :
d) (2x-3)² + (2x+3)² = (4+9) + (4-9) = 13 - 5 = 8
a) A=(x+1)²-9 = 1²+1²-9 = 1+1-9 = -7