-3tga+3tga-tga=-tga=-0.05
<span><span>3<span>x2</span> - 124x - 84 = 0</span>
<span><span>D = (-124)2 - 4·3·(-84)</span> = 16384</span>
<span><span><span>x1 = </span><span>124 - √16384</span> = <span><span>-2</span>3</span></span>2·3</span>
<span><span><span>x2 = </span><span>124 + √16384</span> = 42</span><span>2·3
</span></span></span>
[√(√10-2)*√(√10+2)]/√24=[√[(√10-2)(√10+2)]]/√24=√(10-4)/√24=√6/√24=
=√(6/24)=√(1/4)=1/2