3*√16-√3*√27=3*4-√81=12-9=3
1) в скобках
((5m+2)(5m+2) -(5m-2)(5m-2)) /(5m-2)(5m+2) =(25m² +20m+4 -(25m²-20m+4)) /(5m-2)(5m+2) =(25m²+20m+4 -25m²+20m-4) /(5m-2)(5m+2) =40m /(5m-2)(5m+2)
2) 12-75m² =3(4-25m²) =3(2-5m)(2+5m) = -3(5m-2)(5m+2)
3) при делении дробь переворачиваем и будет умножение
40m/(5m-2)(5m+2) *(-3(5m-2)(5m+2)/20m = -40m*(5m -2)(5m +2) /20m*(5m -2)(5m +2) = -2
ответ: -2
1) 36400:100*95\%=34580 человек
Ответ: 34580
1)=3a^2+6a-a2-6a+9= 2a^2-9
2)=8c+4(1-2c+c^2)=8c+4-8c+4c^2=4+4c^2
3)=a^2-8a+16-6a^2+8a=16-5a
4)=x^2+4x-2x-8-2x-2x^2=-x^2-8
5)=d^2+2d-4d-8-d^2+2d-1=-9