document.write( "Question 363260: The diagram shows an isosceles right triangle.
\n" ); document.write( "The two legs are \"x,\" and the hypotenuse is x radical 2.
\n" ); document.write( "A. If its perimeter is 10, find x.
\n" ); document.write( "B. If its area is 12, find x.
\n" ); document.write( "

Algebra.Com's Answer #259241 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
The diagram shows an isosceles right triangle.
\n" ); document.write( "The two legs are \"x,\" and the hypotenuse is x radical 2.
\n" ); document.write( ":
\n" ); document.write( "A. If its perimeter is 10, find x.
\n" ); document.write( "x + x + \"x%2Asqrt%282%29\" = 10
\n" ); document.write( "2x + \"x%2Asqrt%282%29\" = 10
\n" ); document.write( "\"x%2Asqrt%282%29\" = -2x + 10
\n" ); document.write( "Square both sides
\n" ); document.write( "x^2(2) = (-2x+10)^2
\n" ); document.write( "FOIL (-2x+10)*(-2x+10)
\n" ); document.write( "2x^2 = 4x^2 - 20x - 20x + 100
\n" ); document.write( "2x^2 = 4x^2 - 40x + 100
\n" ); document.write( ":
\n" ); document.write( "Combine on the right
\n" ); document.write( "0 = 4x^2 - 2x^2 - 40x + 100
\n" ); document.write( ":
\n" ); document.write( "A quadratic equation
\n" ); document.write( "2x^2 - 40x + 100 = 0
\n" ); document.write( ":
\n" ); document.write( "Simplify, divide by 2
\n" ); document.write( "x^2 - 20x + 50 = 0
\n" ); document.write( "Use the quadratic formula to find x, a=1; b=-20; c=50
\n" ); document.write( "Two solutions
\n" ); document.write( "x = 17.06
\n" ); document.write( "and
\n" ); document.write( "x = 2.93 is the only reasonable solution
\n" ); document.write( "Check
\n" ); document.write( "2(2.93) + \"2.93%2Asqrt%282%29\" = 10.00
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "B. If its area is 12, find x.
\n" ); document.write( ".5(x*x) = 12
\n" ); document.write( "multiply both sides by 2
\n" ); document.write( "x^2 = 24
\n" ); document.write( "x = \"sqrt%2824%29\"
\n" ); document.write( "x = 4.9
\n" ); document.write( ":
\n" ); document.write( "Check
\n" ); document.write( ".5 * 4.9 * 4.9 = 12.0
\n" ); document.write( "
\n" );