<span>2x^2 - 2x - 1 = 0 a = 2, b = -2, c = -1 b^2 - 4ac = (-2)^2 - 4(2)(-1) = 4 + 8 = 12
so the answer is 12
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Answer:
i like how to tell us to answer something with no file
Step-by-step explanation:
#2 #3 and #5 I think but I could be wrong. Good luck!
5x+(-4)-5x=6x+4-5x
-4=x+4
x=-8
To get rid of 5x on the left side.
