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y=(-x^4)/8 + (x^2)/2 - 1/2. Find the x-intercept.?
The answer from Desmos and the back of the worksheet, is 2^(1/2) and -(2^(1/2)), but I keep getting something entirely different. Please help me!
Update:
Please excuse the grammar error, I am perfectly aware of it.
1 Answer
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- jet lLv 57 years agoFavorite Answer
since y = 0
let z be x^2
-z^2/8+z/2-1/2=0
if we multiply everything by 8
-z^2+4z-4=0
by quadratic formula
z=2
since z = x^2 = 2
x^2=2
x= +/- 2^(1/2)
which is your answer
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