SOLUTION: please explain. b^2-2bc+c^2=(b-c)^2

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Question 111596: please explain.
b^2-2bc+c^2=(b-c)^2

Found 2 solutions by stanbon, MathLover1:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
please explain.
b^2-2bc+c^2=(b-c)^2
----------------------
I'll show you that the right side of the equation is the
same as the left side:
--------------
(b-c)^2
=(b-c)(b-c)
= b(b-c)-c(b-c)
=b^2-bc-bc+c^2
=b^2-2bc+c^2
==============
Cheers,
Stan H.

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
=> these are the square of binomials: %28a%2Bb%29%5E2 and %28a-b%29%5E2
Important to know:
If the binomial has a minus sign, then the minus sign appears only+%0D%0A%0D%0Ain+the+middle+term of the trinomial.
If the binomial is a+%2B+b, then the middle term will be %2B2ab,
and if the binomial is a+-+b, then the middle term will be -2ab;
therefore, we can use the double+sign ("plus_+or_+minus"),
to state the rule as follows:
%28a+%2B-+b%29%5E2+=+a%5E2+%2B-+2ab+%2B+b%5E2
The square of any+binomial produces the following three terms:

1. The square of the first term of the binomial: +a%5E2
2. Twice the product of the two terms: %2B-2ab
3. The square of the second term: b%5E2

The square of every+binomial, called a perfect square trinomial,
has that form: a%5E2+%2B-+2ab+%2B+b%5E2.
So, if your square your binomial %28b-c%29%5E2, it will be:

+%28b-c%29%5E2+=+b%5E2+-2bc+%2B+c%5E2
b%5E2 is the square of b.
-2bc+ is twice the product of 2b%2A%28-c%29+=+-2bc++.
c%5E2 is the square of -c.