a fost răspuns

Calculati [tex](3x-4) ^{2} +
(3x+4) ^{2} -2(3x
+4)(3x-4)[/tex]

Răspuns :

Andyilyeask
[tex](3x-4) ^{2} +(3x+4)^{2}-2(3x+4)(3x-4)= \\ =9x^{2}-24x+16+9x^{2}+24x+16-2(9x ^{2} -16)= \\ =18x^{2}+32-9x^{2}+32=9x^{2}+64[/tex]