4*(2-x)+13x = -10
8-4x+13x = -10
9x = -10-8 = -18
x = -18/9
x = -2
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(1-z)(1-z)=1-z-z+z^2=10(1-2x+z^2)+20z=10-20z+10z^2+20z=10-10z^2=10(1-z)^2
(9a²c)² = 81a⁴c²
(- 0,1 c³d)⁴ = 0,0001c¹²d⁴
![8 x^{2} * \frac{3}{16}y= \frac{8 x^{2} *3y}{16}= \frac{3 x^{2} y}{2} =1,5 x^{2} y](https://tex.z-dn.net/?f=8+x%5E%7B2%7D+%2A+%5Cfrac%7B3%7D%7B16%7Dy%3D+%5Cfrac%7B8+x%5E%7B2%7D+%2A3y%7D%7B16%7D%3D+%5Cfrac%7B3+x%5E%7B2%7D+y%7D%7B2%7D+%3D1%2C5+x%5E%7B2%7D+y++)
(x^2-5x+6)*(x^2+x-2)=0
x^2-5x+6=0
D=25-24=1
x1=(5-1)/2=2
x2=3
x^2+x-2=0
D=1+8=9
x1=(-1+3)/2=1
x2=-2