90/x^2-3x+9 - 5x/x+3 =405/x^3+27?

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90/x^2-3x+9 - 5x/x+3 =405/x^3+27?

2006-10-30 14:07:55 · 2 answers · asked by juan c 1 in Science & Mathematics ➔ Mathematics

2 answers

((5x^2-3x+11)-(90x+270))/((x)^((2-3x+11)+(3x)^(-3x+11))

2006-10-30 14:15:17 · answer #1 · answered by xXxeliasxXx 2 · 0⤊ 0⤋

well , it is not hard ! it is just looks hard !

90(x+3)-5x(x^2-3x+9)=405

after multiply everything it will be :

-5x^3+15x^2+45x=135
and the answer will be x=3 or x=-3 !!

have fun !

2006-10-31 00:51:36 · answer #2 · answered by arash 3 · 0⤊ 0⤋