Joline is solving the equation 0 = x2 – 5x – 4 using the quadratic formula. Which value is the negative real number solution to her quadratic equation? Round to the nearest tenth if necessary. Quadratic formula: x = StartFraction negative b plus or minus StartRoot b squared minus 4 a c EndRoot Over 2 a EndFraction –5.7 –4 –1 –0.7

- 0.7

Step-by-step explanation:

We are given the general quadratic formula, as " . " This can be represented by two separate formula's, which will come in handy when determining the positive and negative roots of the equation ( and here we need the negative root ):

1 ) ,

2 )

We know that a = 1, b = - 5, and c = - 4 from the equation " " ( which can be rewritten in the form ). Therefore, simply plug in these values into the quadratic formula to receive two solutions:

- This is our positive solution

__________

- And this is our negative solution

You can see that - 0.7 is the negative real number solution to Joline's quadratic equation!

853.3

step-by-step explanation: