document.write( "Question 578188: natural domain of the square root of 5+4x-x^2 \n" ); document.write( "
Algebra.Com's Answer #370531 by ad_alta(240)\"\" \"About 
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5+4x-x^2=-(x-5)(x+1) must be greater than or equal to zero, so the we solve 5+4x-x^2>=0 to get -1 <= x <= 5. \n" ); document.write( "
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