document.write( "Question 588700: Hi, I am studying for my college placement test and there is a few math problems that i am having difficulty solving, \r
\n" ); document.write( "\n" ); document.write( "1st. square root of 75/2 + cube root of 2/4 =\r
\n" ); document.write( "\n" ); document.write( "2nd. 1/2(n^2) - n = 190 my answer was n2-n-380=0 but i think is wrong the answer must equal 0\r
\n" ); document.write( "\n" ); document.write( "3rd. 10x^2+5x/5x my answer was 10x^2 but i think is wrong\r
\n" ); document.write( "\n" ); document.write( "4th. how to factor 3x^2-15x, the correct answer is 3x(x-5) but i dont know why or how they get those numbers\r
\n" ); document.write( "\n" ); document.write( "5th. (4x-7)^2= ? my answer was 16x^2+49 but i think is wrong
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Algebra.Com's Answer #374759 by mathhelp@(10)\"\" \"About 
You can put this solution on YOUR website!
(4x-7)^2\r
\n" ); document.write( "\n" ); document.write( " = 16x^2-56x+49 \r
\n" ); document.write( "\n" ); document.write( "not 16x^2+49
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