Ответ:
Объяснение:
2)
1. (2a-b)/(4a²+2ab)-(2a/(b²+2ab)=(2a-b)/(2a*(2a+b))-2a/(b*(2a+b))=
=((2a-b)*b-2a*2a)/(2ab*(2a+b))=(2ab-b²-4a²)/(2ab*(2a+b))=
=-(4a²-2ab+b²)/(2ab*(2a+b)).
2. b²/(8a³-2ab²)+1/(2a+b)=b²/(2a*(4a²-b²)+1/(2a+b)=
=b²/(2a*(2a-b)*(2a+b))+1/(2a+b)=(b²+2a*(2a-b))/(2a*(2a-b)*(2a+b))=
=(b²+4a²-2ab)/(2a*(2a-b)*(2a+b))=(4a²-2ab+b²)/(2a*(2a-b)*(2a+b)).
3. -(4a²-2ab+b²)/(2ab*(2a-+b)):(4a²-2ab+b²)/(2a*(2a-b)*(2a+b))=
=-(4a²-2ab+b²)*(2a*(2a-b)*(2a+b))/(2ab*(2a+b)*(4a²-2ab+b²))=
=-(2a-b)/b=(b-2a)/b.
<span> {<span> y = -2x</span></span>
<span>
8x – 3</span>·<span>(-
2x )=28</span>
<span>
{<span> y=-2x</span></span>
<span>
8x+6x=28</span>
<span>
{<span> y=-2x</span></span>
<span>
14x=28</span>
<span>
{<span> y=-2x</span></span>
<span>
x=2</span>
<span>
{<span> y=-2 </span></span>·<span><span> 2 = -4</span></span>
<span>
x=2</span>
<span>
Ответ: (2;
-4)</span>