document.write( "Question 400012: factor completely 16x² - 225 \n" ); document.write( "
\n" ); document.write( "Hi\n" ); document.write( "factoring completely \n" ); document.write( " 16x^2 - 225\n" ); document.write( " (4x + 15)(4x -15)\n" ); document.write( "Note:SUM of the inner product(60x) and the outer product(-60x) = 0