Answer:
x^4 - 81 = 0
(x² - 9)(x² + 9) = 0
Notice that the first of these is itself a difference of two squares:
(x - 3)(x + 3)(x² + 9) = 0
So the solutions are x = 3, x = -3, x = 3i, x = -3i
Answer:
B
Step-by-step explanation:
its a graph and I agree math is dumb
D: x ≥ 0
7 < √x < 8 ⇒ 7² < x < 8² ⇒ 49 < x < 64
Answer: x = 50 or x = 51 or x = 52 or ... or x = 63.
Answer:
You have to figure out what x means
Step-by-step explanation:
bc i know math. a liitle bit and like to help.