Answer:
Option (2)
Step-by-step explanation:
Given equation is,
x⁴- 9x² + 8 = 0
Let x² = t
By substituting the value of x²= t in the equation,
t² - 9t + 8 = 0
t² - 8t - t + 8 = 0
t(t - 8) - 1(t - 8) = 0
(t - 1)(t - 8) = 0
(t - 1) = 0 ⇒ t = 1
(t - 8) = 0 ⇒ t = 8
Since, t = x²
x² = 1 ⇒ x = ±1
x² = 8 ⇒ x = ±2√2
Therefore, Option (2) will be the correct option.
What he said above yeah y
The union - set of all elements in O and T ( or both ):
O U T = { 49,50,52,54,55,56,59,60,61,62,65,68,70,71,72,74,75 }
Number of elements in the set O U T is 17. Answer: C )
Answer:
19/60
Step-by-step explanation:
3 5/12=41/12
3 1/10=31/10
--------------
41/12-31/10=19/60
