Monday

October 20, 2014

October 20, 2014

Posted by **Jill** on Saturday, April 7, 2012 at 10:16pm.

- math -
**Reiny**, Saturday, April 7, 2012 at 10:49pmcomplex roots always come in pairs, so the other root is -5 - 7i

sum of roots = (-5+7i) + (-5-7i) = -10

product of roots = (-5+7i)(-5-7i)

= 25 - 49i^2 = 25+49 = 74

equation:

x^2 + 10x + 74 = 0

**Answer this Question**

**Related Questions**

Algebra II - 1)What method(s) would you choose to solve the equation: x2 + 2x - ...

Math - -x^3 + 1.85x^2 - x +0.15 = 0 how can you solve for x? An exact solution ...

algebra II - How do you know if a quadratic equation will have one, two, or no ...

algebra II - How do you know if a quadratic equation will have one, two, or no ...

Algebra - Consider the equation: 4x^2 – 16x + 25 = 0 (a) Show how to compute the...

Algebra - Consider the equation 4x^2 – 16x + 25 = 0. (a) Show how to compute the...

Integrated Math 1 - The solutions to the quadratic equation x^2+3x-4=0 are? (...

Math - For the following equation, state the value of the discriminant and then ...

pre calc - A polynomial f(x) with real coefficients and leading coefficient 1 ...

Quadratic -Make up a problem - I am supposed to write a quadratic equation in ...