rozwiąz:
12=13x-x^{2}
12 = 13x - x^2
x^2 - 13x + 12 = 0
a = 1, b = -13, c = 12
D(delta) = b^2 - 4ac = (-13)^2 - 48 = 169-48 = 121
VD = 11
x1 = (-b-VD)/2a = (13-11)/2 = 1
x2 = (-b+VD)/2a = (13+11)/2 = 12
x = 1 v x = 12
musisz doprowadzić do postaci iloczynowej.
przenosisz 12 na drugą stronę.
-x^2+13x+12=0
-(x^2-13x-12)=0
-(x-12)(x-1)=0
masz dwa rozwiązania:
x=12 i x=1
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12 = 13x - x^2
x^2 - 13x + 12 = 0
a = 1, b = -13, c = 12
D(delta) = b^2 - 4ac = (-13)^2 - 48 = 169-48 = 121
VD = 11
x1 = (-b-VD)/2a = (13-11)/2 = 1
x2 = (-b+VD)/2a = (13+11)/2 = 12
x = 1 v x = 12
musisz doprowadzić do postaci iloczynowej.
przenosisz 12 na drugą stronę.
-x^2+13x+12=0
-(x^2-13x-12)=0
-(x-12)(x-1)=0
masz dwa rozwiązania:
x=12 i x=1