Answer:
5±√41/2
Explanation:
The quadratic formula is -b sqrt b^2-4ac
To use this formula the question must be in the ax^2+bx+x=0 format
In this question, there is an invisible one in front of the x^2 so that is the "a"
The "b" is the second term which is -5
The "c" is the third term which is -4
You plug these terms into the equations to get
5±√-5^2-4(1)(-4)
To solve from here you have to solve what is inside the square root symbol first which makes the equation
5±√25+16
5±√41/2
Since the 41 inside of the square root symbol can not be simplified further, that is your answer.