document.write( "Question 623649: Find all the zeros of the equation -4x^4 - 44x^2 + 3600 = 0 \n" ); document.write( "
Algebra.Com's Answer #392205 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,  
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document.write( "Find all the zeros of the equation: 
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document.write( "-4x^4 - 44x^2 + 3600 = 0    | Let X = x^2
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document.write( "-4X^2 - 44X + 3600 = 0
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document.write( "  X^2 + 11X - 900 = 0
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document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
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document.write( "\"X+=+%28-11+%2B-+sqrt%28+3721+%29%29%2F%282%29+\"
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document.write( "  X = 25 OR X = -36
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document.write( "  x^2 = 25,  x= ±5   Zeros
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document.write( "  x^2 = -36  x = ±6i
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