Trigonometry

Write the quadratic function whose zeros are:

1. 2+square root of 5, 2-square root of 5

2. 3+7i,3-7i

3. 5±i

Please tell me how to get them. I have no clue on how to solve them.

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asked by Glenn
  1. 3
    (x-4)(x-6)=0 multiply it out
    x^2-10x+24=0

    I will be happy to check the others.

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