document.write( "Question 1177786: https://gyazo.com/911d576522641918b00f6e16b83a5956 \n" ); document.write( "
Algebra.Com's Answer #806882 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "The response from the other tutor has nothing to do with the question that is asked.

\n" ); document.write( "Her response is about PAIRS of equations which have no COMMON SOLUTION. The question is about single polynomial equations that have no REAL ROOTS.

\n" ); document.write( "A polynomial equation of odd degree will always have at least one real solution, because the end behavior for large positive x is different than for large negative x.

\n" ); document.write( "A polynomial equation of even degree does not need to have a real root, because the end behavior for large positive x and for large negative x is the same. If a polynomial equation of even degree has all coefficients positive, then every term will be positive and the equation will have no real solutions; and likewise if all terms have negative coefficients.

\n" ); document.write( "Here are graphs of two polynomial equations with no real solutions:
\n" ); document.write( "\"y=x%5E2%2B3\"
\n" ); document.write( "\"y=-x%5E4-2x%5E2-1\"

\n" ); document.write( "\"graph%28400%2C400%2C-3%2C3%2C-40%2C40%2Cx%5E2%2B3%2C-x%5E4-2x%5E2-1%29\"

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