How many real roots does the following equation have?
x4 -81 = 0
2 answers:
X^4-81 =
(x^2-9)(x^2+9) =
(x+3)(x-3)(x^2+9)
There are two real roots (at x=3,-3).
Answer:
Find roots of x4−81=0 by solving for x. x=3,−3
Step-by-step explanation:
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