<span>3х+у=2 </span>
<span>х+2у=-6</span>
<span>у=2-3х</span>
<span>х+2(2-3х)= -6</span>
<span>х+4-6х= -6</span>
<span>-5х=-10</span>
<span>х=2</span>
<span>у= -4</span>
<span>Ответ: (2; -4)</span>
B7=b1*q^6 b7=(-0.1)^6*1500=0.0015
А) 4q^2-4q+4
Б)16x^2+8xy+y^2
В)x^2-4/25y^2