Bonsoir,il faut factoriser les expressions suivantes 4x^2 - 12x + 9 7x^2 - 28 (2x - 3)^2 - (5x + 2)^2 (x - 5)^2 -2(x - 5)(x - 3) 2x^2 + 7x x^2 + 26x + 169 (9x^2
Mathématiques
Anonyme
Question
Bonsoir,il faut factoriser les expressions suivantes
4x^2 - 12x + 9
7x^2 - 28
(2x - 3)^2 - (5x + 2)^2
(x - 5)^2 -2(x - 5)(x - 3)
2x^2 + 7x
x^2 + 26x + 169
(9x^2 - 25) +(6x + 10)
x^2 - 4x + 4 - (x - 2)(7 - x)
4x^2 - 12x + 9
7x^2 - 28
(2x - 3)^2 - (5x + 2)^2
(x - 5)^2 -2(x - 5)(x - 3)
2x^2 + 7x
x^2 + 26x + 169
(9x^2 - 25) +(6x + 10)
x^2 - 4x + 4 - (x - 2)(7 - x)
1 Réponse
-
1. Réponse inequation
Bonsoir,
Factoriser:
4x²-12x+9= (2x-3)²
7x²-28= 7(x²-4)= 7(x-2)(x+2)
(2x - 3)² - (5x + 2)²= (2x-3-5x-2)(2x-3+5x+2)= (-3x-5)(7x-1)= - (3x+5)(7x-1)
2x² + 7x= x(2x+7)
x²+26x+169= (x+13)²
(9x² - 25) +(6x + 10)= 9x²+6x-15
x²- 4x + 4 - (x - 2)(7 - x)= (x-2)²-(x-2)(7-x)= (x-2)(x-2-7+x)= (x-2)(2x-9)