X(y-4x)(y+4x). Это точны ответ
Y'=(x³-2x)'(2x+3)+(2x+3)'(x³-2x)=
(3x²-2)(2x+3)+2(x³-2x)=
6x³+9x²-4x-6+2x³-4x=
8x³+9x²-8x-6
X=arcctg7+πn
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Sin(45° + α) - cos(45° + α) / sin(45° + α) + cos(45° + α) = (√2/2•cos α + √2/2•sin α - (√2/2•cos α - √2/2•sin α)) / (√2/2•cos α + √2/2•sin α + (√2/2•cos α - √2/2•sin α)) = √2•sin α / √2•cos α = tg α