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anonymous
 5 years ago
solve the equation 8x^3+4x^218x9=0 algebraically for all values of x. help pleaseeee!!
anonymous
 5 years ago
solve the equation 8x^3+4x^218x9=0 algebraically for all values of x. help pleaseeee!!

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0factor 4x^2 out of first two terms: 4x^2*(2x+1) factor (9) out or other two terms: (9)*(2x+1) Factor (2x+1) out of both terms you get: (2x+1)*(4x9)=0 so, your solution  when one or other multp = 0, so 2x+1=0 and /or 4x9=0 should be easy to solve it from this point. Let me know if there is a problem. Good Luck!

radar
 5 years ago
Best ResponseYou've already chosen the best response.0When you factor out the (2x+1) you actually get: \[(4x ^{2}9)(2x+1)\] which when further factored get: (2x+3)(2x3)(2x+1) Now you have all three roots.
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