Answer:
is NOT true.
Step-by-step explanation:
1.
......True
( 1 )² = 1
2.
If
........ NOT True
∴ x =± 1 .........this is correct
3.
......True
( -1 )² = 1
4.
x2 = 1 if and only if x = 1 or x = -1.
.........True
( 1 )² = 1
( -1 )² = 1
Answer:
non of the above thanks
don't ask me again please
Answer:
7i sqrt(2)
Step-by-step explanation:
sqrt(-98)
We know that sqrt( ab) = sqrt(a) sqrt(b)
sqrt(-1) sqrt(98)
The sqrt (-1) = i
i sqrt(98)
i sqrt(49) sqrt(2)
i*7* sqrt(2)
7i sqrt(2)
Answer:
40m^2 152.6m^2
Step-by-step explanation:
Area = π x r^2
Area = π x 12^2
Area = 144π or 452.16 square units. ( using 3.14 for PI)
Circumference = 2*PI *radius
Circumference = 12π or 37.68 units ( using 3.14 for PI)