LZORO8942
Answered

(4 x - 1 )(x + 3) =4x²


36x² - 121 = 0


(5 x - 7)(5 x + 7) = 32
il faut résoudre les équations suivantes voilà merci​

Sagot :

Salut !

=> (4x-1)(x+3) = 4x²

4x²+ 12x - x - 3 = 4x²

4x²- 4x²+ 11x - 3 = 4x²

11x = 3

x = 3/11

=> 36x² = 121

36x² = 11²

(6x+11)(6x-11)

=> (5x-7)(5x+7) = 32

25x²- 49 = 32

25x² = 49+32

25x² = 81

25x² = 9²

(5x+9)(5x-9)