Określ dziedzine i rozwiąż równanie [(x-4)/(x+1)]- [(x+8)/(x-8)]=-3
[(x-4)/(x+1)]- [(x+8)/(x-8)]=-3 /*(x+1)(x-8) D=R/{-1 ; 8}
(x-4)(x-8)-(x+8)(x+1)=-3(x+1)(x-8)
x²-8x-4x+32-x²-x-8x-8=-3(x²-8x+x-8)
-21x+24=-3x²+24x-3x+24
3x²-42x=0
3x(x-14)=0
3x=0 lub x-14=0
x=0 lub x=14
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[(x-4)/(x+1)]- [(x+8)/(x-8)]=-3 /*(x+1)(x-8) D=R/{-1 ; 8}
(x-4)(x-8)-(x+8)(x+1)=-3(x+1)(x-8)
x²-8x-4x+32-x²-x-8x-8=-3(x²-8x+x-8)
-21x+24=-3x²+24x-3x+24
3x²-42x=0
3x(x-14)=0
3x=0 lub x-14=0
x=0 lub x=14