Hello i understand evrything without the last part where they get (a+b)^2... (Relate to the familiar) i try to understand but i dont get it, i would be glad if some1 could try explain for me.
edit: idk why My picture become like that... Well, sorry for bad pictures..
ExpandOriginally Posted by Petrus
edit: idk why My picture become like that... Well, sorry for bad pictures..
^2=a^2+2ab+b^2 = \underbrace{a^2+b^2}_{h^2}+4\cdot \left(\underbrace{\frac12 ab}_{= 25}\right))
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earboth explained and thats so logic