SOLUTION: Hello can someone show me how to write the square root of -9 +8 (which is not under the square root sign as a comples number in standard form. and is x^2-x-1 a prime quadratic

Question 719865: Hello can someone show me how to write the square root of -9 +8 (which is not under the square root sign as a comples number in standard form.
and is x^2-x-1 a prime quadratic .what is a prime qudratic.Thanks
Answer by jsmallt9(3758) (Show Source): You can put this solution on YOUR website!

3*i+8
8 + 3i

If the discriminant, , is a perfect square then the quadratic will factor (i.e. it is not prime). If the discriminant is not a perfect square then the quadratic is prime.

For the discriminant is:

5 is not a perfect square so is prime.
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