Решение: 4x^5+28x^3y^2+49y^4
<span>sin^2 (A)+ cos^2(A)=1 cos(A)=0,6</span>
<span><span>AB=BD=x x^2=x^2+144-24x*0,6 x=10</span></span>
<span><span>S=10*12*0,8=96</span></span>
18 чисел
1) 9750,9705,9570,9507,9075,9057.
2)7950,7905,7509,7590,7095,7059.
3)5970,5970,5790,5097,5709,5079.
4-1,19/15= (60-1,19)/15=58,81/15=3целые13,81/15