document.write( "Question 23773: How do I solve for b?\r
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Algebra.Com's Answer #12539 by AnlytcPhil(1806)\"\" \"About 
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How do I solve for b? \r\n" );
document.write( "16b-squared - 9 = 0\r\n" );
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document.write( "16b2 - 9 = 0\r\n" );
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document.write( "Two ways.  Factoring method:\r\n" );
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document.write( "16b2 - 9 = 0\r\n" );
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document.write( "can be written as\r\n" );
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document.write( "(4b)2 - 32 = 0\r\n" );
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document.write( "This is the difference of two perfect squares. The difference of two perfect\r\n" );
document.write( "squares factors into the product of the sum and differencve of the two square\r\n" );
document.write( "roots.\r\n" );
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document.write( "(4b - 3)(4b + 3) = 0\r\n" );
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document.write( "Now use the zero-factor principle, which is to put \" = 0 \" after each of those\r\n" );
document.write( "two parenthetical factors and solve for the two answers:\r\n" );
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document.write( "4b - 3 = 0                4b + 3 = 0\r\n" );
document.write( "    4b = 3                    4b = -3 \r\n" );
document.write( "     b = 3/4                   b = -3/4\r\n" );
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document.write( "Second way:  Taking square roots:\r\n" );
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document.write( "16b2 - 9 = 0\r\n" );
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document.write( "Add 9 to both sides\r\n" );
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document.write( "16b2 = 9\r\n" );
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document.write( "Take the square roots of both sides, remembering that there are\r\n" );
document.write( "two square roots.\r\n" );
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document.write( "square roots of 16b2 = ±Ö9\r\n" );
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document.write( "                  4b = ±3\r\n" );
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document.write( "                   b = ±3/4\r\n" );
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document.write( "Edwin\r\n" );
document.write( "AnlytcPhil@aol.com
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