Réponses

2013-01-02T16:43:20+01:00

PA² = (3x+3)² = 9x²+18x+9

PS² = (4x+4)² = 16x²+32x+16

AS² = (5x+5)² = 25x²+50x+25

 

PA² +PS² = 9x²+18x+9+16x²+32x+16 =  25x²+50x+25