Aparabola of the form y=2x^2+bx+c has complex roots of -1 plus/minus 4i. find the values of b and c.

asap and !

Step-by-step explanation:

The sum of the two roots is ...

  (-1 +4i) + (-1 -4i) = -2

This value is the opposite of b/2, so b = -2(-2) = 4.

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The product of the two roots is ...

  (-1 +4i)(-1 -4i) = ((-1)² -(4i)²) = 1 +16 = 17

This value is c/2, so c = 2(17) = 34.

The value of b is 4; the value of c is 34.

Further explanation

A quadratic factored as ...

  y = a(x -p)(x -q)

expands to ...

  y = ax^2 -a(p+q)x +apq

So, for roots p and q, ...

  b = -a(p+q)

  c = apq

In this problem , a=2, p=-1+4i, q=-1-4i.

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step-by-step explanation:

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