Rozwiąż równianie a)x2+10x+25=0 b)2x2-9x-35=0 c)4x2-13x+3=0 d)-6x2+13x+5=0 e)-2x2+5x+9=0
Rozwiązanie:
a) x2 + 10x + 25 = 0
Delta < 0
brak rozwiązań
b) 2x2 - 9x - 35 = 0
Delta = 361
x1 = 9 - 19/ 4 = - 2,5
x2 = 7
c) 4x2 - 13x + 3 = 0
Delta = 121
x1 = 1/4
x2 = 3
d) -6x2 + 13x + 5 = 0
Delta = 289
x1 = 2,5
x2 = - 1/3
e) -2x2 + 5x + 9 = 0
Delta = 97
x1 = -5 - pierwiastek z 97 / -4
x2 = -5 + pierwiastek z 97 / -4
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Rozwiązanie:
a) x2 + 10x + 25 = 0
Delta < 0
brak rozwiązań
b) 2x2 - 9x - 35 = 0
Delta = 361
x1 = 9 - 19/ 4 = - 2,5
x2 = 7
c) 4x2 - 13x + 3 = 0
Delta = 121
x1 = 1/4
x2 = 3
d) -6x2 + 13x + 5 = 0
Delta = 289
x1 = 2,5
x2 = - 1/3
e) -2x2 + 5x + 9 = 0
Delta = 97
x1 = -5 - pierwiastek z 97 / -4
x2 = -5 + pierwiastek z 97 / -4