у = -х²+6х
(0; у)
точка (0; 0)
<span>3*(1,2x-4)=1,2-0,4x </span>
<span>3.6x-12=1.2-0.4x</span>
<span>3.6x+0.4x=1.2+12</span>
<span>4x=13.2</span>
<span>x=13.2:4=3.3</span>
x^2(x-5)-(x-5)=0