<em>Умножаешь сначала
</em><em>0,0002*200=0,04
</em><em>Далее </em>
<em>0,04*2000=80</em>
4x^2+3x-16x-12+3=0
4x^2-13x-9=0
D=<span><span><span><span><span>(<span>−13</span>)^</span>2</span>−<span><span>4·4</span>·<span>(<span>−9</span>)</span></span></span>=<span>169+144</span></span>=313=17,7
</span><span>x1=-(-13)+17,7/2*4= 30,7/8=3,8
X2=-(-13)-17,7/2*4=-4,7/8=-0,6
</span>
2а(x+y)+x+y=2а(х+у)+1(х+у)=(2а+1)(х+у)