document.write( "Question 585212: a metalworker makes a box from a 15in by 20in piece of tin by cutting a square with side length x out of each corner and folding up the sides. wright and simplify an expression for the area for the base of the box.\r
\n" ); document.write( "\n" ); document.write( " (it's meaning a foil method equation as the expression.)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " HELP PLZ \n" ); document.write( "
Algebra.Com's Answer #373315 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
a metalworker makes a box from a 15in by 20in piece of tin by cutting a square with side length x out of each corner and folding up the sides.
\n" ); document.write( " write and simplify an expression for the area for the base of the box.
\n" ); document.write( ":
\n" ); document.write( "With squares removed the dimensions of the box will be:
\n" ); document.write( "(15-2x) by (20-2x) by x
\n" ); document.write( ":
\n" ); document.write( "Area of the base
\n" ); document.write( "FOIL
\n" ); document.write( "(15-2x) * (20-2x) = 300 - 30x - 40x + 4x^2
\n" ); document.write( ":
\n" ); document.write( "Combine like terms to form a quadratic equation
\n" ); document.write( "f(x) = 4x^2 - 70x + 300. sq/in is the area of the base
\n" ); document.write( " \n" ); document.write( "
\n" );