document.write( "Question 631914: I dont know how to use this formula x= -b + or - the square root of b2 -4ac over 2a for this equation y= x2 -25 \n" ); document.write( "
Algebra.Com's Answer #397937 by ankor@dixie-net.com(22740)\"\" \"About 
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Solve equation y = x^2 - 25, using the quadratic formula
\n" ); document.write( "a = 1
\n" ); document.write( "b = 0
\n" ); document.write( "c = -25
\n" ); document.write( "x = 0+/-\"%28sqrt%280+-+4%2A1%2A-25%29%29%2F2\" = +/-\"%28sqrt%28100%29%29%2F2\" = +/-\"10%2F2\"
\n" ); document.write( "Two solutions
\n" ); document.write( "x = +5
\n" ); document.write( "x = -5
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