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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)

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