document.write( "Question 33428: x^2+4X=-4
\n" ); document.write( "solve by zero-product \n" ); document.write( "

Algebra.Com's Answer #19780 by sarah_adam(201) $\"\"$ $\"About$

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The zero Product Rule :
\n" ); document.write( "If ab = 0, then a = 0 or b = 0.
\n" ); document.write( " $\"x%5E2\"$ +4x = -4
\n" ); document.write( " $\"x%5E2\"$ +4x+4 = 0
\n" ); document.write( " $\"x%5E2\"$ +2x+2x+4 = 0
\n" ); document.write( "x(x+2)+2(x+2)=0
\n" ); document.write( "(x+2)(x+2)=0
\n" ); document.write( "so according to Zero - Product principle
\n" ); document.write( "(x+2) = 0 or (x+2) = 0
\n" ); document.write( "x+2-2 = 0 -2
\n" ); document.write( "x = -2
\n" ); document.write( " \n" ); document.write( "

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