Answer:x = +- 2 and x = +- √2
Step-by-step explanation:
Let's covert x^4 - 6x^2 + 8 = 0 into quadratic equation.
Let e = x ^ 2
So,
(x^2)^2 - 6x^2 + 8 = 0
e^2 - 6e + 8 = 0
e^2 - 4e - 2e + 8 = 0
e( e - 4 ) -2( e - 4 )
( e - 4 ) ( e - 2 ) = 0
Either,
e - 4 = 0
x^2 - 4 = 0 ( REMEMBER THAT e= x^2)
x^2 = 4
x = +- 2
Or,
e - 2 = 0
x^2 = 2
x = +- √2
Answer: 7/12x
Step-by-step explanation:
Answer:
C
Step-by-step explanation:5 days times how much she works per day need to be at least or greater than 240 hence why the sign is greater than or equal too.
Answer:
96 km/hr
Step-by-step explanation:
Average number of kilometers per hour = 4,608 km / 48 hours
Average number of kilometers per hour = 96 km/hr
The anwser is either 2.88 or 3, But others are saying it is 3.
