8√3:√108=8√3:√36√3=8:√36=8/6 дальше сам сократи
2x(x+3)=12x-4
<span>2x^2+6x=12x-4 </span>
<span>2x^2-6x+4=0 </span>
<span>x^2-3x+2=0 </span>
<span>(x-1)(x-2)=0 </span>
<span>x1=1, x2=2</span>
<span>(y - a)(y - b) = y</span>² <span>- (a + b) *y + ab,
</span>(y - a)(y - b) = y² - ya - yb + ab,
(y - a)(y - <span>b) = y * (y - a) - b * (y - a),
</span>(y - a)(y - b) = (y - a)(y - <span>b)</span>