Cześć. :))) Oto rozwiązania ^^ a) (x-1)²-(x+4)²= -2x+1 x²-2x+1-x²-8x-16= -2x+1 -8x-15=1 -8x=16 x=-2 b) (x+5)²-(x-3)²=x+1 x²+10x+25-x²+6x-9=x+1 15x=1+9-25 15x=-15 x=-1 c) (x -5)²-(x-3)²=4(x-2) x²-10x+25-x²+6x-9=4x-8 -8x=-24 x=3 Liczę na naj :)))
a) x²-2x+1-(x²+8x+16)=-2x+1 x²-2x+1-x²-8x-16=-2x+1 -2x-8x+2x=1-1+16 -8x=16/(-8) x=-2 b) (x+5)²-(x-3)²=x+1 x²+10x+25-(x²-6x+9)=x+1 x²+10x+25-x²+6x-9=x+1 10x+6x-x=1-25+9 15x=-15/15 x=-1 c) (x -5)²-(x-3)²=4(x-2) x²-10x+25-(x²-6x+9)=4x-8 x²-10x+25-x²+6x-9=4x-8 -10x+6x-4x=-8-25 -8x=-33/(-8) x=4⅛
a) (x-1)²-(x+4)²= -2x+1 x²-2x+1-(x²+8x+16)=-2x+1 x²-2x+1-x²-8x-16=-2x+1.................x² i -x² skrócą się -2x-8x+2x=1+16-1 -8x=16/÷(-8) x=-2 b) (x+5)²-(x-3)²=x+1 x²+10x+25-(x²-6x+9)=x+1 x²+10x+25-x²+6x-9=x+1 10x=1+9 10x=10/÷ 10 x=1 c) (x -5)²-(x-3)²=4(x-2) x²-10x+25-(x²-6x+9)=4x-8 x²-10x+25-x²+6x-9=4x-8 -10x+6x-4x=-8+9-25 -8x=-24/÷(-8) x=3
