I am struggling with this problem I need to solve
it using quadratic formula. Any help would be
appreciated.
x˛ 10x 1 = -10
x˛ - 10x - 1 = -10
Get 0 on the right by adding 10 to both sides
x˛ - 10x + 9 = 0
That COULD be done by factoring, but since you
specified "the quadratic formula":
The quadratic formula is:
______
-b ą Öb˛-4ac
x =
2a
where a = 1; b = -10; c = 9
______________
-(-10) ą Ö(-10)˛-4(1)(9)
x =
2(1)
______
10 ą Ö100-36
x =
2
__
10 ą Ö64
x =
2
10 ą 8
x =
2
Using the +, x = = = 9
Using the -, x = = = 1
Those are the two solutions.
Edwin