Vivian is solving the equation 0=x2−5x−4 0 = x 2 − 5 x − 4 using the quadratic formula. Which value is the negative real number solution to her quadratic equation? Round to the nearest tenth if necessary. -5.7 -4 -1 -0.7
Accepted Solution
A:
answer:-0.7steps:the quadratic formula is[tex] \frac{ - b + - \sqrt{ {b}^{2} - 4ac } }{2a} [/tex]substitute the correct values in[tex] \frac{ - ( - 5) + - \sqrt{ {( - 5)}^{2} - 4(1)( - 4) } }{2(1)} [/tex]where it says +- you would type this into your calculator with + AND THEN - to get two separate answers.when you type + you get the answer of: 5.701562119...when you type - you get the answer of:-0.7015621187...when you round to the nearest tenth you get -0.7hope this helps! :)have a great day ~ •lipika•