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what is the answer of (13r-a)square

Sagot :

Dominiidn
[tex]Given\ situation; \\ \boxed{(13r-a)^{2}} \\ \\ Solution; \\ \\ \boxed{\boxed{Formula;\to(a)^{2}+2(a)(b)+(b)^{2}}} \\ \\ (13r)^{2}+2(13r)(-a)+(-a)^{2} \\ \\ 169r^{2}+26r(-a)+a^{2} \\ \\ \boxed{\boxed{169r^{2}-26ra+a^{2}}} \\ \\ Hope\ it\ Helps:) \\ Domini[/tex]
Jeremiaidn
(13r-a)^2?
Just think of it that it is like this:
13-squared x r-squared  -a-squared
169  x r-squared  a-squared
=169r^2+a^2
Now, WHY DID -a-squared become positive a-squared?
Answer: Given -3-squared:
We all know that -3-squared is 9.
But, it is just the same with 3-squared and both of them yields 9.
So, simple, we just simplified it, done!