Odpowiedź:
1.
a)
5=0*a+0*b+c
5=c
3=1a+1b+5
*-3=4a-2b+5
3-b-5=a
a=-2-b
*-3=4(-2-b)+5
-3=-8-4b+5
-3+8-5=-4b
0=-4b
b=0
a=3-0-5=-2
y=-2x^2+5
p=0
∆=0-4*(-2)*5=40
q=-40/(4*(-2))=-40/-8=5
b)
11=0*a+0*b+c
c=11
-1=4a-2b+11
-17=4a+2b+11 odejmowanie stronami
16=-4b
b=-4
a=(-12+2b)/4=(-12-8)/4=-5
y=-5x^2-4x+11
p=4/-10=-2/5
∆=16-4*(-5)*11=16+220=236
q=-236/-20=59/5
y=-5(x+2/5)^2+59/5
2.
∆=36-4*1*5=16
X1=(6+4)/2=5
x2=(6-4)/2=1
4x^2-4x+1-4=0
4x^2-4x-3=0
∆=16-4*4*(-3)=16+48=64
X1=(4+8)/8=3/2
x2=(4-8)/8=-1/2
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Odpowiedź:
1.
a)
5=0*a+0*b+c
5=c
3=1a+1b+5
*-3=4a-2b+5
3-b-5=a
a=-2-b
*-3=4(-2-b)+5
-3=-8-4b+5
-3+8-5=-4b
0=-4b
b=0
a=3-0-5=-2
y=-2x^2+5
p=0
∆=0-4*(-2)*5=40
q=-40/(4*(-2))=-40/-8=5
y=-2x^2+5
b)
11=0*a+0*b+c
c=11
-1=4a-2b+11
-17=4a+2b+11 odejmowanie stronami
16=-4b
b=-4
a=(-12+2b)/4=(-12-8)/4=-5
y=-5x^2-4x+11
p=4/-10=-2/5
∆=16-4*(-5)*11=16+220=236
q=-236/-20=59/5
y=-5(x+2/5)^2+59/5
2.
a)
∆=36-4*1*5=16
X1=(6+4)/2=5
x2=(6-4)/2=1
b)
4x^2-4x+1-4=0
4x^2-4x-3=0
∆=16-4*4*(-3)=16+48=64
X1=(4+8)/8=3/2
x2=(4-8)/8=-1/2