(a+6)²-3a(4-5a) = a²+12a+36-12a+15a² = 16a²+36
16a²+36 = 16 * (-1/4)² +36 = -1+36 = 35
<em><u>Ответ: 35</u></em>
Решение
log₂ 6 - log₂ (3/16) = log₂ [6 / (3/16)] = log₂ 32 = log₂ 2⁵ = 5log₂ 2 = 5
Д=8²-4*13=64-52=12
х1=-8-√12/2=-8-2√3/2=-4-√3
между числами -5 и -6
2arcsin(√3/2)+3arcsin(-1/2)=2*π/3+3*(-π/6) =2π/3-3π/6=2π/3-π/2=π/6