Answer:
The fourth one
Step-by-step explanation:
I know that is correct
Answer:
Step-by-step explanation:
Rewrite this as

Knowing that i-squared = -1:

Both i-squared and 100 are perfect squares, so this simplifies to
±10i
Answer:6.6 y
Step-by-step explanation:
Answer:
x=-1 and x=5
Step-by-step explanation:
we have

Solve it by completing the square method
We take the coefficient of x that is -4, divide it by 2 and then square it
so

square it

Adds 4 both sides

Combine like terms right side

Rewrite as perfect squares

take square root both sides


therefore

