Question

Może mi ktoś pomóć z góry dziekuje

X3-8=0

X4+81=0

6x2+6x-72=0

Answer 1

x^3 - 8 = 0

x^3 = 8

x^3 = 2^3

x = 2

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x^4 + 81 = 0  nie ma rozwiązania, bo x^4 > = 0

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6 x^2 + 6 x - 72 = 0  / : 6

x^2 + x - 12 = 0

delta = 1^2 - 4*1*( -12) = 1 + 48 = 49

p( delty) = 7

x1 = [ - 1 - 7]/2 = - 4

x2 = [ - 1 + 7]/2 = 3

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