Ответ:
1
Объяснение:
(х-у)(х+у)/(3х^2) •х/(3(х-у))=(х+у)/(9х)=(√3 +√(3•64))/(9√3)=√3(1+√64) (9√3)=(1+8)/9=9/9=1
1) ( 7 + x)^2 = 49 + 14x + x^2
2) (2x - 3)^2 = 4x^2 - 12x + 9
3) (x^2 + 4)^2 = x^4 + 8x^2 + 16
4) ( n + 5)(n - 5) = n^2 - 25
5) (5k - 2n)(5k + 2n) = 25k^2 - 4n^2
6) (1/4n^2 + 2/5)(1/4n^2 - 2/5) = 1/16n^4 - 4/25