document.write( "Question 30334: Question:
\n" ); document.write( "What can you say about the solutions of this nonlinear system?
\n" ); document.write( "y=4x^2+4
\n" ); document.write( "y=2x^2-4\r
\n" ); document.write( "\n" ); document.write( "(a) the system has no solution
\n" ); document.write( "(b) the system has two real solutions
\n" ); document.write( "(c) the system had two imaginary solutions
\n" ); document.write( "(d) the system has on solution of multiplicity 2.
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Algebra.Com's Answer #17008 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
\"y+=+4x%5E2+%2B+4\"
\n" ); document.write( "\"y+=+2x%5E2+-+4\"
\n" ); document.write( "subtract the 2nd from the 1st
\n" ); document.write( "\"0+=+4%2AX%5E2+%2B+4+-+2%2Ax%5E2+%2B+4\"
\n" ); document.write( "\"2%2Ax%5E2+%2B+8+=+0\"
\n" ); document.write( "\"2%2A%28x%5E2+%2B+4%29+=+0\"
\n" ); document.write( "divide both sides by 2
\n" ); document.write( "\"x%5E2+%2B+4+=+0\"
\n" ); document.write( "\"x+=+0%2B-+sqrt%28-4%29%29+\"
\n" ); document.write( "\"x+=+%2B%28sqrt%284%29+%2A+sqrt%28-1%29%29\"
\n" ); document.write( "\"x+=+%2B2%2Ai\"
\n" ); document.write( "also
\n" ); document.write( "\"x+=+-%28sqrt%284%29+%2A+sqrt%28-1%29%29\"
\n" ); document.write( "\"x+=+-2%2Ai\"
\n" ); document.write( "so, the answer is (c), the system has 2 imaginary solutions
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