Sagot :
Bonjour
A = (2x+2)(x-1)+(2x-3)(x+3)
=2x^2 -2x + 2x -2 + 2x^2+6x-3x-9
=4x^2+3x-11
B=(-x+1)(3x-1)-(2x+1)(2x-1)
=-3x^2+x+3x-1-(4x^2-1^2)
=-3x^2+4x-1-4x^2+1
=-7x^2
Bonsoir
Voilà pour toi
(2x + 2) x (x-1) + (2x-3) x (x+ 3)
2x^2 - 2x + 2x - 2 + (2x-3) x (x+ 3)
2x^2 - 2x + 2x - 2 + 2x^2 + 6x - 3x - 9
2x^2 - 2 + 2x ^2 + 6x - 3x - 9
4x^2 - 2 + 6x - 3x - 9
4x ^2 - 11 + 6x - 3x
4x ^2 - 11 + 3x
A = 4x^2 + 3x - 11
( -x-1 ) x ( 3x - 1 ) - ( 2x + 1 ) x ( 2x - 1 )
-3x ^ 2 + x -3x+1 - (2x+1) x (2x-1)
-3x ^ 2 +x - 3x + 1 - (4x ^ 2 - 1 )
-3x ^ 2 +x - 3x + 1 - 4x ^ 2 + 1
- 7x ^ 2 + x - 3x + 1 + 1
- 7x ^ 2 - 2x + 1 + 1
B = - 7x ^ 2 - 2x + 2
Voilà j’espère que j’ai pu t’aider
Voilà pour toi
(2x + 2) x (x-1) + (2x-3) x (x+ 3)
2x^2 - 2x + 2x - 2 + (2x-3) x (x+ 3)
2x^2 - 2x + 2x - 2 + 2x^2 + 6x - 3x - 9
2x^2 - 2 + 2x ^2 + 6x - 3x - 9
4x^2 - 2 + 6x - 3x - 9
4x ^2 - 11 + 6x - 3x
4x ^2 - 11 + 3x
A = 4x^2 + 3x - 11
( -x-1 ) x ( 3x - 1 ) - ( 2x + 1 ) x ( 2x - 1 )
-3x ^ 2 + x -3x+1 - (2x+1) x (2x-1)
-3x ^ 2 +x - 3x + 1 - (4x ^ 2 - 1 )
-3x ^ 2 +x - 3x + 1 - 4x ^ 2 + 1
- 7x ^ 2 + x - 3x + 1 + 1
- 7x ^ 2 - 2x + 1 + 1
B = - 7x ^ 2 - 2x + 2
Voilà j’espère que j’ai pu t’aider