Odpowiedź:
x≠3 x≠-3
7/( x²-9) + 5/(x-3) - 1/( x+3)= 7/( x²-9) + 5*( x+3) / (x²-9) - (x-3) /( x²-9)=
( 7+5x+15-x+3) /(x²-9)= ( 25+4x) /(x²-9) = (25+4x) /(x+3)(x-3)
Szczegółowe wyjaśnienie:
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Odpowiedź:
x≠3 x≠-3
7/( x²-9) + 5/(x-3) - 1/( x+3)= 7/( x²-9) + 5*( x+3) / (x²-9) - (x-3) /( x²-9)=
( 7+5x+15-x+3) /(x²-9)= ( 25+4x) /(x²-9) = (25+4x) /(x+3)(x-3)
Szczegółowe wyjaśnienie: