Question

Solve a4 – 81 = 0. State the number and type of roots.
(Hint: a2 = t)

a. 2 real: –3 and 3
b. 2 real: –3 and 3
c. 2 real: –9 and 9
d. 2 imaginary: 3i and –3i

Answer 1

Answer:

b) 2 real : -3and 3

Step-by-step explanation:

3*3*3*3-81=0