Step-by-step explanation:
f(x) = x² - 4
y = x²-4
x = y²-4
x + 4 = y²

Rounded it equals $30. It was really like $29.83 :)
Answer:
You should ask your teacher for help and pay attention in class
Step-by-step explanation:
Answer:
x = ±
i
Step-by-step explanation:
subtract 64 from both sides
9x² = - 64 ( divide both sides by 9 )
x² = -
( take the square root of both sides )
x = ±
= ±
i