64-16x+x^2(^2 - означает в квадрате)
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![f(x)=4x^3\\f'(x)=12x^2\\f'(-3)=12\cdot 9=108](https://tex.z-dn.net/?f=f%28x%29%3D4x%5E3%5C%5Cf%27%28x%29%3D12x%5E2%5C%5Cf%27%28-3%29%3D12%5Ccdot%209%3D108)
Sin2x=(cos²x/2-sin²x/2)(cos²x/2+sin²x/2)
sin2x=cosx
2sinxcosx-cosx=0
cosx(2sinx-1)=0
cosx=0⇒x=π/2+πn
sinx=1/2⇒x=(-1)^n *π/6+πn
F(x-4) = (x-4)^2
(x-4)^2=x^2
x^2-8x+16=x^2
-8x=-16
x=2