..............................
<span>Х^2>=289
x^2-289>=0
(x-17)(x+17)>=0
==========-17=========17===========
+++++++++++ --------------- +++++++++
x=(-oo -17]U[17 +oo)</span>
-<span>4x*(-2)+3x=18
8x + 3x = 18
11x = 18
x = 1 7/11
x + 5/7 - 3 = 2x - 1/4
x = 5/7 - 3 + 1/4
x = - 2 1/28
</span>