URGENT JE VOUS REMERCIE reconnaître une différence de 2 carrée puis factoriser : (x+1)²-36 25-(2x+3)² (8x-4)²-9x² 4x²-(x-5)²

a²-b² = (a+b) (a-b)

(x+1)²-36
= (x+1)²-6²
= (x+1+6) (x+1-6)
= (x+7) (x-5)

25-(2x+3)²
= 5²-(2x+3)²
= (5+2x+3) (5-2x-3)
= (2x+8) (-2x+2)

(8x-4)²-9x²
= (8x-4)²-(3x)²
= (8x-4+3x) (8x-4-3x)
= (11x-4) (5x-4)

4x²-(x-5)²
= (2x)²-(x-5)²
= (2x+x-5) (2x-x+5)
= (3x-5) ( x+5)