- + - +
______.______o________.______
-1 1 2
а) <span> (√6+<span> √10)*2<span> √2-2<span> √12=2<span> √12+2<span>√20-2<span>√12=<span> 2√20</span></span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>б) (2√5-7)в квадрате+28√5=20-28√5+28√5=20</span></span></span></span></span></span></span></span>
6/7*(-0,79)-2,74*6/7=6/7( -0,79-2,74)=6/7*(-3,53)=6/7*(-3 53/100)=6/7*(-353/100)=
= -1059/350= -3 9/350