Jawabanmu

2014-01-20T15:23:46+07:00
\sqrt{1} ^{2} -   \sqrt{2} ^{2}
maksudnya itu (akar pertama)^2 - (akar kedua)^2 Rumusnya sperti apa ??
2014-01-20T15:32:16+07:00
X1^2-x2^2=(x1+x2)^2
(x1+x2)^2=x1 + 2x1.x2 + x2


(x1 + x2) - 2x1.x2= x1^2-x2^2

= x1^2-x2^2



1 3 1