document.write( "Question 70423: Is the following trinomial a perfect square:
\n" ); document.write( "x^2 + 4x - 4\r
\n" ); document.write( "\n" ); document.write( "I thought trinomials were written in sqrt form, is this not true?? Thank you \n" ); document.write( "

Algebra.Com's Answer #50304 by 303795(602) $\"\"$ $\"About$

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If this is a perfect square then it can be written as some term all squared.
\n" ); document.write( " $\"x%5E2+%2B+4x+-+4\"$ can't be written in this form as you will need to square the last part of the term and it must end up with a negative number at the end.
\n" ); document.write( "However $\"x%5E2+-+4x+%2B+4\"$ on the other hand could be written as $\"%28x-2%29%5E2\"$ and $\"x%5E2+%2B+4x+%2B+4\"$ could be written as $\"%28x%2B2%29%5E2\"$ .
\n" ); document.write( "These last two would therefore be perfect squares.
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