document.write( "Question 89877: How would you find the points that the graphs of the equation in the following systems have in common?
\n" ); document.write( "x^2+y^2=4
\n" ); document.write( "x=y
\n" ); document.write( "

Algebra.Com's Answer #65238 by checkley75(3666)\"\" \"About 
You can put this solution on YOUR website!
FIRST I WOULD PLOT THEM & SEE IF THERE IS ANY OBVIOUS SOLUTION.
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+x%2C+y%5E2+=+-x%5E2+%2B4%29+\" (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = x and y^2 = -x^2
\n" ); document.write( "+4).
\n" ); document.write( "OR SET X=Y & SOLE FOR Y IN THE FIRST EQUATION
\n" ); document.write( "Y^2+Y^2=4
\n" ); document.write( "2Y^2=4
\n" ); document.write( "Y^2=4/2
\n" ); document.write( "Y^2=2
\n" ); document.write( "Y=+/-1.414 ANSWER.
\n" ); document.write( "X=Y=+/-1.414 ANSWER.
\n" ); document.write( "
\n" );