6 - 2X + 15 - 3X = - 5X + 21
при Х = ( - 0.2)
- 5* ( - 0.2) + 21 = 1 + 21 = 22 (ОТВЕТ)
∛(-2 10/27)= ∛(-64/27)= ∛(-4³/3³)= -4/3= -1 1/3
S = √(p(p - a)(p- b)(p - c))
p = (a+b+c)/2 = (13+14+15)/2 = 21
S = √(21*8*7*6) = √(7^2*2^2*2^2*3^2) = 7*2*2*3 = 84
1/12; 1/6(2/12); 3/6(6/12, 1/2); 9/12(3/4)