x^2+xy-2yx-2y^2=x(x+y)-2y(x+y)=(x+y)(x-2y)
В прикрепленном всё есть:)
<span>i = 0.4sin10^(6)t </span><span> = 0.4sin(w*t)
w = </span><span>10^(6) = 1/корень( L*C )</span>
<span>корень( L*C ) = 1/w
L=</span><span>1/(w^2*C) = </span>1/((<span><span>10^(6))</span>^2*</span><span>200*10^(-12)) Гн = </span><span>0,005 Гн
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