funkcja kwadratowa, oblicz delte, 2xkwadrat-20x=22, 3xkwadrat-x+1=0, xkwadrat=9, 4xkwadrat-7x=0, 3ykwadrat+5y+2=0
delta= b^2 - 4 * a*c
2x^2 -20x=22
2x^2-20x-22=0
delta=400+176=576
pierw. z delta=24
x1=20-24 /4 =-4/4 = -1
x2=20+24 / 4 =44/4 = 11
3x^2-x+1=0
delta=1-12=-11
delta< 0, brak miejsc zerowych
x^2=9
x^2-9=0
delta=0 - 4 * 1 *(-9)=0+36=36
pierw. z delta=6
x1=0-6/2=-3
x2=6/2=3
4x^2-7x=0
delta=49-4*4*0=49-0=49
pierw. z delta=7
x1=7-7/8=0
x2=7+7/8=14/8=7/4
3y^2+5y+2=0
delta=25 - 4 * 3 * 2 = 25 -25=1
pierw. z delta=1
y1=-5-1/6=-6/6=-1
y2=-5+1/6=-4/6=-2/3
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delta= b^2 - 4 * a*c
2x^2 -20x=22
2x^2-20x-22=0
delta=400+176=576
pierw. z delta=24
x1=20-24 /4 =-4/4 = -1
x2=20+24 / 4 =44/4 = 11
3x^2-x+1=0
delta=1-12=-11
delta< 0, brak miejsc zerowych
x^2=9
x^2-9=0
delta=0 - 4 * 1 *(-9)=0+36=36
pierw. z delta=6
x1=0-6/2=-3
x2=6/2=3
4x^2-7x=0
delta=49-4*4*0=49-0=49
pierw. z delta=7
x1=7-7/8=0
x2=7+7/8=14/8=7/4
3y^2+5y+2=0
delta=25 - 4 * 3 * 2 = 25 -25=1
pierw. z delta=1
y1=-5-1/6=-6/6=-1
y2=-5+1/6=-4/6=-2/3