Ответ:
Объяснение:
ctg(x/2+π/8)=√3
x/2+π/8=π/6+πn
x/2=π/6-π/8+πn |×2
x=π/3-π/4+2πn=(4π-3π)/12+2πn=π/12+2πn
x=π/12+2πn.
<span>вот первый номер весь))
а)=8x^2+24x+9-24x=8x^2+9
б)</span><span>.=4x^2-20x+25+20x=4x^25
в)=2x^2-2*2x*5+5^2+20x=4x^2-20x+25+20x=4x^2+25
г)= 36c-3*1^2+2*1*6+1^2=36c-6*6c+1=30c-5
Номер 2
a)</span><span>y^2-100 = </span><span>(y-10)*(y+10)
б)-
в)</span><span>a^4-25 = </span>(a^2-5)*(a^2+5)<span>
г)</span><span>49-x^2 = </span><span>-(x-7)*(x+7)
д)-
е)</span><span>9-a^4 = </span><span>-(a^2-3)*(a^2+3)</span>
2)x^2-2y^2=14 x^2=х(в квадрате) , просто так легче писать)