Question

Using the quadratic equation formula to solve 7x^2-x=7, what are the values of x

Answer 1

quadratic formula:

x = -b ± √(b² - 4ac)

             2a

7x² - x = 7

subtract 7 from both sides:

7x² - x - 7 = 0

plug values into the quadratic formula:

x = -(-1) ± √((-1)²- 4(7)(-7))

               2(7)

simplify:

x = 1 ± √(197)

           14