X^2 - 3x - 18 = 0
D = 9 + 4*18 = 81 = 9^2
x1 = (3 + 9)/2 = 12/2 = 6
x2 = (3 - 9)/2 = - 6/2 = - 3
<span>5°<10<span>° => sin<span>5°=<span>5°*π/180<span>°=π/36=3,14/36≈0,09</span></span></span></span></span>
.....................................................
(8х-3):5=(3х+1):10 умножаем на 10 обе стороны получается