Объяснение:
у=х²+px+q
A(1; -1)
B(3;-2)
{-1=1²+p+q
{-2=3²+3p+q
{-1=1+p+q
{-2=9+3p+q
- ——————
1= -8-2p
2p= -8-1
2p= -9
p= -9/2
-1=1+(-9/2)+q
-2=2-9+2q
-2= -7+2q
2q= -2+7
2q=5
q=5/2
ответ: р= -9/2 ; q=5/2
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Объяснение:
у=х²+px+q
A(1; -1)
B(3;-2)
{-1=1²+p+q
{-2=3²+3p+q
{-1=1+p+q
{-2=9+3p+q
- ——————
1= -8-2p
2p= -8-1
2p= -9
p= -9/2
-1=1+(-9/2)+q
-2=2-9+2q
-2= -7+2q
2q= -2+7
2q=5
q=5/2
ответ: р= -9/2 ; q=5/2