Question

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 = –5.7 –4 –1 –0.7

Answer 1

Hi,

The Answer to this question is:

D) -0.7

Hope this Helps!

Answer 2

x = [-b + - sqrt(b^2 - 4 * a * c)] / 2a
x = [5 + - sqrt(25 - 4* 1 * -4)] /2
x = [5 + - sqrt(25 + 16)] /2
x = [5 + - sqrt(41)]2
x = [5 + sqrt(41)]/2 = 5.7
x = [5 - sqrt(41)] /2 = -0.7

The answer is -0.7