Odpowiedzi

2009-12-16T22:48:47+01:00
-(x-4)²=(3-x)(3+x)
-(x²-8x+16)=3²-x²
-x²+8x-16=9-x²
-x²-x²+8x=9+16
8x=25
x=²⁵/₈
x=3¹/₈
2009-12-16T22:49:05+01:00
-(x²-8x+16)=9-x²
-x²+8x-16=9-x²
8x=9+16
8x=25
x=3,125