How do you solve #x^2+8x+7=0#?
The solutions are
The equation is of the form
The Discriminant is given by:
The solutions are found using the formula
Solve y = x^2 + 8x + 7 = 0
Ans: -1 and -7
Since (a - b + c = 0), use the shortcut. The 2 real roots are (- 1) and (-c/a = - 7).
Reminder of Shortcut :
a. When a + b + c = 0: 2 real roots: (1) and (c/a)
b. When (a - b + c ) = 0: 2 real roots: (-1) and (-c/a)
Remember this Shortcut. It will save you a lot of time and effort.