Read this lesson on completing the square by prince_abubu, if you do not know how to complete the square. Let's convert to standard form by dividing both sides by 1: \n" );
document.write( "We have: . \n" );
document.write( "What we want to do now is to change this equation to a complete square . How can we find out values of somenumber and othernumber that would make it work? \n" );
document.write( "Look at : . Since the coefficient in our equation that goes in front of x is -10, we know that -10=2*somenumber, or . So, we know that our equation can be rewritten as , and we do not yet know the other number. \n" );
document.write( "We are almost there. Finding the other number is simply a matter of not making too many mistakes. We need to find 'other number' such that is equivalent to our original equation . \n" );
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document.write( " The highlighted red part must be equal to 32 (highlighted green part). \n" );
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document.write( " , or . \n" );
document.write( "So, the equation converts to , or . \n" );
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document.write( " Our equation converted to a square , equated to a number (-7). \n" );
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document.write( " There is no number whose square can be negative. So, there is no solution to this equation |
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