( - 0,2p - 10q)^2 =
= ( - 0,2p)^2 - 2( - 0.2p)*10q + 100q^2 =
= 0,04p^2 + 4pq + 100q^2
2\3= 6\9
1 5\9*1.7=14\9*17\10=238\90=2 29\45
-1 = а*0+b*0+c
c=-1
<span>y=ах^2+bх-1
</span>
-b/2a = -1
<span>-4=а(-1)^2+b(-1)-1
</span>
b=2a
<span>-4=а-b-1
</span>
b=2a
<span>-4=а-2a-1, -4=-a-1, a=3
</span>
b=2a=2*3=6
a=3, b=6, c=-1