<span>Ответ: 2) x</span>²<span> + 15 > 0</span>
<span>3-3a при a =1и a = -1
</span>3-3*1=0
3-3*(-1)=6
(5^{2n+2)*2^{2n+2)=10^{2n+2}/2010^{2n} = 1000^{2n}/2010^{2n} = -1010^{2n}
1)
20-14/25*3,83 =20 - 0,56*3,83= 20 - 2,1448=17,8552
2)6/5-(3,15-12,1:5,5)= 1,2 -(3,15-2,2)=1,2-0,95=0,25