(х-у)(х+у)=16;
х(х-у)=10;
1+у/х=1,6;
х(х-у)=10;
у=0,6х;
0,4х²=10;
у=±3;
х=±5.
<span>Ответ: (-3;-5), (3;5).</span>
Не не верно там 6 выходит)
3*(9-х) // (<span>√x)^2</span>- 3<span>√x = 3*(3^2 -(<span>√x)^2) // <span>√x*(<span>√x-3)= 3*(3-√x)(3+<span>√x) // <span>√x*(<span>√x-3)= -3*(<span>√x-3)*(3+<span>√x) // <span>√x*(<span>√x-3)= 9+<span>√x // <span>√x</span></span></span></span></span></span></span></span></span></span></span></span></span>
1) x^6:x^4=x^6-4=x^2
2)(x^2)^2=x^4
3)x^4*x^-2=x^2