document.write( "Question 37461: y=(x+1)(x-2)=0 \n" ); document.write( "

Algebra.Com's Answer #23180 by fractalier(6550) $\"\"$ $\"About$

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From (x+1)(x-2) = 0, we can reason it this way:
\n" ); document.write( "We have two quantities being multiplied.
\n" ); document.write( "Their product is zero.
\n" ); document.write( "The ONLY way this can be is if one or both quantities are zero.
\n" ); document.write( "Thus we set each equal to zero, and find what values of x make them so.
\n" ); document.write( "So we have
\n" ); document.write( "x + 1 = 0 and then x = -1 and
\n" ); document.write( "x - 2 = 0 and then x = 2
\n" ); document.write( "and we're done. \n" ); document.write( "

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