(5 - 3x²) - 0,5·(2x - 3)(2x + 3) = 7x² + 2,5,
5 - 3x² - 0,5·(4x² - 9) =7x² + 2,5,
5 - 3x² - 2x² + 4,5 = 7x² + 2,5,
-3x² - 2x² - 7x² = 2,5 - 4,5 - 5,
- 12 x² = -7
![x^{2}=\frac{7}{12} , \\ x_{1} = \sqrt{ \frac{7}{12} }, x_{2} = -\sqrt{ \frac{7}{12} }](https://tex.z-dn.net/?f=x%5E%7B2%7D%3D%5Cfrac%7B7%7D%7B12%7D+%2C+%5C%5C+x_%7B1%7D+%3D+%5Csqrt%7B+%5Cfrac%7B7%7D%7B12%7D+%7D%2C++x_%7B2%7D+%3D+-%5Csqrt%7B+%5Cfrac%7B7%7D%7B12%7D+%7D+)
16(sin³x+cos³x)=16•(sinx+cosx)•(sin²x-sinxcosx+cos²x)=
=16•0.5•(1- sinxcosx)=8•(1- sinxcosx)=(sinx+cosx)²=sin²x+2sinxcosx+cos²x=1+2sinxcosx=0.5² = sinxcosx=
=(0.25-1)/2=-0.375<span>=8•(1+0.375)=11.</span>
У=х2+8
у=х•2+8
у=2х+8
у=х+8
ХER