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What is the expanded expression of (x-7)^2 
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Justin409

by Justin409 at April 11, 2010

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(x-7)^2 means to multiply (x-7) times itself so it is       (x-7)(x-7).  You can use FOIL or the distributive property. Using the Distribituve Property we multiply    x(x-7) -7(x-7)=x(x) -7(x)-7(x)-(7)(-7)=x^2-14x+49.
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Pamela086 Pamela086 April 11, 2010

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Expanding (x-7)^2 means multiply the (x-7) to itself:(x-7)(x-7) ==>   x.x   +     x.-7    -7.x    -7.-7 ---(FOIL)                          x^2         -7x      -7x    +49                          x^2 -14x+49that's it.    
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KamelSadr KamelSadr April 11, 2010

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=(x-7)(x-7)=x^2-7x-7x+49=x^2-14x+49
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gibby. gibby. April 11, 2010

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x^2-14x+49
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sjyDavid sjyDavid April 11, 2010

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x^2-14x+49=0 
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sjyDavid sjyDavid April 11, 2010

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x^2-14x+49 the key is : (a-b)^2= a^2-2ab+b^2
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Nini007 Nini007 April 12, 2010

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x^2 -14x+49
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jorge__omg....... jorge__omg....... April 12, 2010

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