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- anonymous

please help I will fan and medal
A quadratic equation is shown below:
9x2 − 16x + 60 = 0
Part A: Describe the solution(s) to the equation by just determining the radicand. Show your work.
Part B: Solve 4x2 + 8x − 5 = 0 by using an appropriate method. Show the steps of your work, and explain why you chose the method used.

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- DanJS

the radicand is the part underneath the root in the quadratic formula

- DanJS

b^2 - 4 a*c

- anonymous

okay so how would I answer part a

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- DanJS

the equation given has the standard form ax^2 + bx + c = 0, what is the radicand?

- anonymous

would it be b

- DanJS

The quadratic formula is
\[x = \frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]
the radicand under the root tells you if you have real or complex solutions depending if it is positive or negative value

- DanJS

b^2 - 4*a*c = (-16)^2 - 4 * 9 * 60 = -1904

- DanJS

a negative under a square root has imaginary solutions

- anonymous

okay the as part says to Describe the solution(s) to the equation by just determining the radicand. the solutions are imaginary but how would I show my work?

- anonymous

- DanJS

Show the calculation i did above, turns out negative

- DanJS

For B) not sure what appropriate method means, if it works , that is good, you may be able to factor it, but you can always apply that quadratic formula

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