Question

am nevoie mâine dimineață.
doar cele incercuite ​

Answer 1

Răspuns:

Explicație pas cu pas:

4x^2 = 324

x^2 = 324 : 4 = 81

x1 = 9; x2 = -9

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7x^2 = 6300

x^2 = 6300 : 7 = 900

x1 = 30; x2 = -30

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x^2 = 16

x1 = 4; x2 = -4

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x^2 + 4 = 5

x^2 = 5 - 4 = 1

x1 = 1; x2 = -1

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x^2 = √625 = 25

x1 = 5; x2 = -5

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2x^2 = 1,62

x^2 = 1,62 : 2 = 0,81

x1 = -0,9; x2 = 0,9

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19x^2 + 18 = 17

19x^2 = 17 - 18 = -1 nu are solutii in R

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29(x^2 - 3) = 0

x^2 - 3 = 0

x^2 = 3

x1 = -√3; x2 = √3