document.write( "Question 63113This question is from textbook
\n" ); document.write( ": can you help me solve by using the quadratic formula of x^2-4x-5=0? \n" ); document.write( "

Algebra.Com's Answer #44045 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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can you help me solve by using the quadratic formula of x^2-4x-5=0?
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\n" ); document.write( "Here it is step by step:
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\n" ); document.write( "In the form ax^2 + bx + c = 0; your problem: a=1; b=-4; -5
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\n" ); document.write( " $\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"$
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\n" ); document.write( " $\"x+=+%28-%28-4%29+%2B-+sqrt%28+%28-4%29%5E2-4%2A1%2A-5+%29%29%2F%282%2A1%29+\"$
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\n" ); document.write( " $\"x+=+%28%2B4+%2B-+sqrt%28+16+-+%28-20%29+%29%29%2F%282%29+\"$
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\n" ); document.write( " $\"x+=+%284+%2B-+sqrt%28+16+%2B+20+%29%29%2F%282%29+\"$
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\n" ); document.write( " $\"x+=+%284+%2B-+sqrt%28+36+%29%29%2F%282%29+\"$
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\n" ); document.write( " $\"x+=+%284+%2B-+6+%29%2F2+\"$
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\n" ); document.write( "Solution using +6:
\n" ); document.write( " $\"x+=+%284+%2B+6+%29%2F2+\"$
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\n" ); document.write( " $\"x+=+10%2F2+\"$
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\n" ); document.write( "x = +5
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\n" ); document.write( "Solution using -6:
\n" ); document.write( " $\"x+=+%284+-+6+%29%2F2+\"$
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\n" ); document.write( " $\"+x+=+-2%2F2+\"$
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\n" ); document.write( "x = -1
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\n" ); document.write( "Learn this and you can do them all the same way!
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