Please help me out! (Picture shown) Will give Brainliest!

Answer:
They forgot to reverse b
Step-by-step explanation:
-1 is supposed to be +1
-(b) +- (b^2 - 4(a)(c)
------------------------
2(a)
OR
-(-1) +- ((-1)^2-4(1)(-30))
-----------------------------
2(1)