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Yesterday, 15:30

Solve the equation x to the 2nd power=0.81

a-none of them

b-x=0.9 only!

c-x=0.9 or x = - 0.9

d-x = - 0.9 only!

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Answers (1)
  1. Yesterday, 18:32
    0
    You take the square root of 0.81 which equals 0.9. Because a quadratic function can have two roots, the answer is C
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