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January 29, 2015

January 29, 2015

Posted by **Fin** on Wednesday, May 18, 2011 at 8:24pm.

Does it = 100x + 1

- math -
**MathMate**, Thursday, May 19, 2011 at 8:53amMemorizing the following identities will help you with similar problems:

(a+b)^2=a^2+2ab+b^2

(a-b)^2=a^2-2ab+b^2

Now put a=10x, b=1 and apply to (a-b)^2

(10x - 1)^2

=(10x)^2 -2(10x*))+(1)^2

=100x²-20x+1

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